diff --git a/bin/test-crawl b/bin/test-crawl
index 8ad475aea..20dc1f069 100755
--- a/bin/test-crawl
+++ b/bin/test-crawl
@@ -44,7 +44,6 @@ args = parser.parse_args()
 
 # Import Django, call setup()
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", args.settings or "ietf.settings_testcrawl")
-os.environ["DJANGO_URLIZE_IETF_DOCS_PRODUCTION"] = "1"
 
 import django
 import django.test
@@ -175,7 +174,7 @@ def check_html_valid(url, response, args):
             assert ret
             for m in json.loads(ret)["messages"]:
                 if "lastLine" not in m:
-                    tag = m  # just dump the raw JSON for now
+                    tag = m["message"]
                 else:
                     tag = vnu_fmt_message(url, m, content.decode())
                 # disregard some HTML issues that are (usually) due to invalid
@@ -211,7 +210,7 @@ def skip_url(url):
             r"^/wg/[a-z0-9-]+/deps/svg/",
             # Skip other bad urls
             r"^/dir/tsvdir/reviews/",
-            r"^/ipr/\d{,3}/history/",
+            # r"^/ipr/\d{,3}/history/",
             # Skip most html conversions, not worth the time
             r"^/doc/html/draft-[0-9ac-z]",
             r"^/doc/html/draft-b[0-9b-z]",
diff --git a/ietf/doc/templatetags/ietf_filters.py b/ietf/doc/templatetags/ietf_filters.py
index f162a6bbc..896d327e7 100644
--- a/ietf/doc/templatetags/ietf_filters.py
+++ b/ietf/doc/templatetags/ietf_filters.py
@@ -4,7 +4,6 @@
 
 import datetime
 import re
-import os
 from urllib.parse import urljoin
 
 from email.utils import parseaddr
@@ -19,7 +18,6 @@ from django.utils.encoding import force_text
 from django.utils.encoding import force_str # pyflakes:ignore force_str is used in the doctests
 from django.urls import reverse as urlreverse
 from django.core.cache import cache
-from django.core.validators import URLValidator
 from django.core.exceptions import ValidationError
 
 import debug                            # pyflakes:ignore
@@ -29,7 +27,7 @@ from ietf.doc.models import ConsensusDocEvent
 from ietf.utils.html import sanitize_fragment
 from ietf.utils import log
 from ietf.doc.utils import prettify_std_name
-from ietf.utils.text import wordwrap, fill, wrap_text_if_unwrapped, bleach_linker
+from ietf.utils.text import wordwrap, fill, wrap_text_if_unwrapped, bleach_linker, bleach_cleaner, validate_url
 
 register = template.Library()
 
@@ -189,69 +187,82 @@ def rfceditor_info_url(rfcnum : str):
     return urljoin(settings.RFC_EDITOR_INFO_BASE_URL, f'rfc{rfcnum}')
 
 
-def doc_exists(name):
-    """Check whether a given document exists"""
+def doc_canonical_name(name):
+    """Check whether a given document exists, and return its canonical name"""
+
     def find_unique(n):
         key = hash(n)
         found = cache.get(key)
         if not found:
             exact = DocAlias.objects.filter(name=n).first()
             found = exact.name if exact else "_"
-            cache.set(key, found)
+            cache.set(key, found, timeout=60*60*24)  # cache for one day
         return None if found == "_" else found
 
-    # all documents exist when tests are running
-    if settings.SERVER_MODE == 'test':
-        # unless we are running test-crawl, which would otherwise 404
-        if "DJANGO_URLIZE_IETF_DOCS_PRODUCTION" not in os.environ:
-            return True
-
     # chop away extension
-    extension_split = re.search(r"^(.+)\.(txt|ps|pdf)$", name)
+    extension_split = re.search(r"^(.+)\.(txt|ps|pdf|html)$", name)
     if extension_split:
         name = extension_split.group(1)
 
     if find_unique(name):
-        return True
+        return name
 
     # check for embedded rev - this may be ambiguous, so don't
     # chop it off if we don't find a match
-    rev_split = re.search("^(.+)-([0-9]{2,})$", name)
+    rev_split = re.search(r"^(charter-.+)-(\d{2}-\d{2})$", name) or re.search(
+        r"^(.+)-(\d{2}|[1-9]\d{2,})$", name
+    )
     if rev_split:
         name = rev_split.group(1)
         if find_unique(name):
-            return True
+            return name
 
-    return False
+    return ""
 
 
 def link_charter_doc_match1(match):
-    if not doc_exists(match[0]):
+    if not doc_canonical_name(match[0]):
         return match[0]
     return f'<a href="/doc/{match[1][:-1]}/{match[2]}/">{match[0]}</a>'
 
 
 def link_charter_doc_match2(match):
-    if not doc_exists(match[0]):
+    if not doc_canonical_name(match[0]):
         return match[0]
     return f'<a href="/doc/{match[1][:-1]}/{match[2]}/">{match[0]}</a>'
 
 
 def link_non_charter_doc_match(match):
-    if not doc_exists(match[0]):
+    name = match[0]
+    cname = doc_canonical_name(name)
+    if not cname:
         return match[0]
-    if len(match[3]) == 2 and match[3].isdigit():
-        return f'<a href="/doc/{match[2][:-1]}/{match[3]}/">{match[0]}</a>'
+    if name == cname:
+        return f'<a href="/doc/{cname}/">{match[0]}</a>'
+
+    # if we get here, the name probably has a version number and/or extension at the end
+    rev_split = re.search(r"^(" + re.escape(cname) + r")-(\d{2,})", name)
+    if rev_split:
+        name = rev_split.group(1)
     else:
-        return f'<a href="/doc/{match[2]}{match[3]}/">{match[0]}</a>'
+        return f'<a href="/doc/{cname}/">{match[0]}</a>'
+
+    cname = doc_canonical_name(name)
+    if not cname:
+        return match[0]
+    if name == cname:
+        return f'<a href="/doc/{cname}/{rev_split.group(2)}/">{match[0]}</a>'
+
+    # if we get here, we can't linkify
+    return match[0]
 
 
 def link_other_doc_match(match):
-    # there may be whitespace in the match
-    doc = re.sub(r"\s+", "", match[0])
-    if not doc_exists(doc):
+    doc = match[2].strip().lower()
+    rev = match[3]
+    if not doc_canonical_name(doc + rev):
         return match[0]
-    return f'<a href="/doc/{match[2].strip().lower()}{match[3]}/">{match[1]}</a>'
+    return f'<a href="/doc/{doc}{rev}/">{match[1]}</a>'
 
 
 @register.filter(name="urlize_ietf_docs", is_safe=True, needs_autoescape=True)
@@ -264,8 +275,8 @@ def urlize_ietf_docs(string, autoescape=None):
             string = escape(string)
         else:
             string = mark_safe(string)
-    exp1 = r"\b(?<![/\-:=#])(charter-(?:[\d\w\.+]+-)*)(\d\d-\d\d)(\.txt)?\b"
-    exp2 = r"\b(?<![/\-:=#])(charter-(?:[\d\w\.+]+-)*)(\d\d)(\.txt)?\b"
+    exp1 = r"\b(?<![/\-:=#])(charter-(?:[\d\w\.+]+-)*)(\d{2}-\d{2})(\.(?:txt|ps|pdf|html))?\b"
+    exp2 = r"\b(?<![/\-:=#])(charter-(?:[\d\w\.+]+-)*)(\d{2})(\.(?:txt|ps|pdf|html))?\b"
     if re.search(exp1, string):
         string = re.sub(
             exp1,
@@ -281,7 +292,8 @@ def urlize_ietf_docs(string, autoescape=None):
             flags=re.IGNORECASE | re.ASCII,
         )
     string = re.sub(
-        r"\b(?<![/\-:=#])(((?:draft-|bofreq-|conflict-review-|status-change-)(?:[\d\w\.+]+-)*)([\d\w\.+]+?)(\.txt)?)\b(?![-@])",
+        r"\b(?<![/\-:=#])((?:draft-|bofreq-|conflict-review-|status-change-)[\d\w\.+-]+(?![-@]))",
+        # r"\b(?<![/\-:=#])(((?:draft-|bofreq-|conflict-review-|status-change-)(?:[\d\w\.+]+-)*)([\d\w\.+]+?)(\.(?:txt|ps|pdf|html))?)\b(?![-@])",
         link_non_charter_doc_match,
         string,
         flags=re.IGNORECASE | re.ASCII,
@@ -295,6 +307,7 @@ def urlize_ietf_docs(string, autoescape=None):
     )
     return mark_safe(string)
 
+
 urlize_ietf_docs = stringfilter(urlize_ietf_docs)
 
 @register.filter(name='urlize_related_source_list', is_safe=True, needs_autoescape=True)
@@ -492,10 +505,8 @@ def ad_area(user):
 @register.filter
 def format_history_text(text, trunc_words=25):
     """Run history text through some cleaning and add ellipsis if it's too long."""
-    full = mark_safe(text)
-    if "</a>" not in full:
-        full = urlize_ietf_docs(full)
-    full = bleach_linker.linkify(full)
+    full = mark_safe(bleach_cleaner.clean(text))
+    full = bleach_linker.linkify(urlize_ietf_docs(full))
 
     return format_snippet(full, trunc_words)
 
@@ -840,7 +851,6 @@ def is_valid_url(url):
     """
     Check if the given URL is syntactically valid
     """
-    validate_url = URLValidator()
     try:
         validate_url(url)
     except ValidationError:
diff --git a/ietf/doc/templatetags/tests_ietf_filters.py b/ietf/doc/templatetags/tests_ietf_filters.py
index 81fccc01d..9c9687015 100644
--- a/ietf/doc/templatetags/tests_ietf_filters.py
+++ b/ietf/doc/templatetags/tests_ietf_filters.py
@@ -1,56 +1,96 @@
 # Copyright The IETF Trust 2022, All Rights Reserved
 
-from ietf.doc.templatetags.ietf_filters import urlize_ietf_docs
+from django.conf import settings
+
+from ietf.doc.factories import (
+    WgDraftFactory,
+    IndividualDraftFactory,
+    CharterFactory,
+    NewRevisionDocEventFactory,
+)
+from ietf.doc.models import State, DocEvent, DocAlias
+from ietf.doc.templatetags.ietf_filters import urlize_ietf_docs, is_valid_url
+from ietf.person.models import Person
 from ietf.utils.test_utils import TestCase
 
-import debug # pyflakes: ignore
+import debug  # pyflakes: ignore
+
 # TODO: most other filters need test cases, too
 
 
 class IetfFiltersTests(TestCase):
+    def test_is_valid_url(self):
+        cases = [(settings.IDTRACKER_BASE_URL, True), ("not valid", False)]
+        for url, result in cases:
+            self.assertEqual(is_valid_url(url), result)
+
     def test_urlize_ietf_docs(self):
+        wg_id = WgDraftFactory()
+        wg_id.set_state(State.objects.get(type="draft", slug="rfc"))
+        wg_id.std_level_id = "bcp"
+        wg_id.save_with_history(
+            [
+                DocEvent.objects.create(
+                    doc=wg_id,
+                    rev=wg_id.rev,
+                    type="published_rfc",
+                    by=Person.objects.get(name="(System)"),
+                )
+            ]
+        )
+        DocAlias.objects.create(name="rfc123456").docs.add(wg_id)
+        DocAlias.objects.create(name="bcp123456").docs.add(wg_id)
+        DocAlias.objects.create(name="std123456").docs.add(wg_id)
+        DocAlias.objects.create(name="fyi123456").docs.add(wg_id)
+
+        id = IndividualDraftFactory(name="draft-me-rfc123456bis")
+        id_num = IndividualDraftFactory(name="draft-rosen-rfcefdp-update-2026")
+        id_num_two = IndividualDraftFactory(name="draft-spaghetti-idr-deprecate-8-9-10")
+        id_plus = IndividualDraftFactory(name="draft-odell-8+8")
+        id_plus_end = IndividualDraftFactory(name="draft-durand-gse+")
+        id_dot = IndividualDraftFactory(name="draft-ietf-pem-ansix9.17")
+        charter = CharterFactory()
+        e = NewRevisionDocEventFactory(doc=charter, rev="01")
+        charter.rev = e.rev
+        charter.save_with_history([e])
+        e = NewRevisionDocEventFactory(doc=charter, rev="01-00")
+        charter.rev = e.rev
+        charter.save_with_history([e])
+
         cases = [
             ("no change", "no change"),
-            ("bcp1", '<a href="/doc/bcp1/">bcp1</a>'),
-            ("Std 003", '<a href="/doc/std3/">Std 003</a>'),
+            ("bCp123456", '<a href="/doc/bcp123456/">bCp123456</a>'),
+            ("Std 00123456", '<a href="/doc/std123456/">Std 00123456</a>'),
             (
-                "FYI02 changes Std 003",
-                '<a href="/doc/fyi2/">FYI02</a> changes <a href="/doc/std3/">Std 003</a>',
+                "FyI  0123456 changes std 00123456",
+                '<a href="/doc/fyi123456/">FyI  0123456</a> changes <a href="/doc/std123456/">std 00123456</a>',
             ),
-            ("rfc2119", '<a href="/doc/rfc2119/">rfc2119</a>'),
-            ("Rfc 02119", '<a href="/doc/rfc2119/">Rfc 02119</a>'),
-            ("draft-abc-123", '<a href="/doc/draft-abc-123/">draft-abc-123</a>'),
+            ("rfc123456", '<a href="/doc/rfc123456/">rfc123456</a>'),
+            ("Rfc 0123456", '<a href="/doc/rfc123456/">Rfc 0123456</a>'),
+            (wg_id.name, f'<a href="/doc/{wg_id.name}/">{wg_id.name}</a>'),
             (
-                "draft-ietf-rfc9999-bis-01.txt",
-                '<a href="/doc/draft-ietf-rfc9999-bis/01/">draft-ietf-rfc9999-bis-01.txt</a>',
+                f"{id.name}-{id.rev}.txt",
+                f'<a href="/doc/{id.name}/{id.rev}/">{id.name}-{id.rev}.txt</a>',
             ),
             (
-                "foo RFC 9999 draft-ietf-rfc9999-bis-01 bar",
-                'foo <a href="/doc/rfc9999/">RFC 9999</a> <a href="/doc/draft-ietf-rfc9999-bis/01/">draft-ietf-rfc9999-bis-01</a> bar',
+                f"foo RFC 123456 {id.name}-{id.rev} bar",
+                f'foo <a href="/doc/rfc123456/">RFC 123456</a> <a href="/doc/{id.name}/{id.rev}/">{id.name}-{id.rev}</a> bar',
             ),
             (
-                "New version available: <b>draft-bryan-sipping-p2p-03.txt</b>",
-                'New version available: <b><a href="/doc/draft-bryan-sipping-p2p/03/">draft-bryan-sipping-p2p-03.txt</a></b>',
+                f"New version available: <b>{id.name}-{id.rev}.txt</b>",
+                f'New version available: <b><a href="/doc/{id.name}/{id.rev}/">{id.name}-{id.rev}.txt</a></b>',
             ),
             (
-                "New version available: <b>charter-ietf-6man-04.txt</b>",
-                'New version available: <b><a href="/doc/charter-ietf-6man/04/">charter-ietf-6man-04.txt</a></b>'
+                f"New version available: <b>{charter.name}-{charter.rev}.txt</b>",
+                f'New version available: <b><a href="/doc/{charter.name}/{charter.rev}/">{charter.name}-{charter.rev}.txt</a></b>',
             ),
             (
-                "New version available: <b>charter-ietf-6man-03-07.txt</b>",
-                'New version available: <b><a href="/doc/charter-ietf-6man/03-07/">charter-ietf-6man-03-07.txt</a></b>'
+                f"New version available: <b>{charter.name}-01-00.txt</b>",
+                f'New version available: <b><a href="/doc/{charter.name}/01-00/">{charter.name}-01-00.txt</a></b>',
             ),
             (
                 "repository https://github.com/tlswg/draft-ietf-tls-ticketrequest",
-                'repository https://github.com/tlswg/draft-ietf-tls-ticketrequest'
-            ),
-            (
-                "draft-madanapalli-nd-over-802.16-problems",
-                '<a href="/doc/draft-madanapalli-nd-over-802.16-problems/">draft-madanapalli-nd-over-802.16-problems</a>'
-            ),
-            (
-                 "draft-madanapalli-nd-over-802.16-problems-02.txt",
-                '<a href="/doc/draft-madanapalli-nd-over-802.16-problems/02/">draft-madanapalli-nd-over-802.16-problems-02.txt</a>'
+                "repository https://github.com/tlswg/draft-ietf-tls-ticketrequest",
             ),
             (
                 '<a href="mailto:draft-ietf-some-names@ietf.org">draft-ietf-some-names@ietf.org</a>',
@@ -58,19 +98,50 @@ class IetfFiltersTests(TestCase):
             ),
             (
                 "http://ieee802.org/1/files/public/docs2015/cn-thaler-Qcn-draft-PAR.pdf",
-                "http://ieee802.org/1/files/public/docs2015/cn-thaler-Qcn-draft-PAR.pdf"
-            )
+                "http://ieee802.org/1/files/public/docs2015/cn-thaler-Qcn-draft-PAR.pdf",
+            ),
+            (
+                f"{id_num.name}.pdf",
+                f'<a href="/doc/{id_num.name}/">{id_num.name}.pdf</a>',
+            ),
+            (
+                f"{id_num.name}-{id_num.rev}.txt",
+                f'<a href="/doc/{id_num.name}/{id_num.rev}/">{id_num.name}-{id_num.rev}.txt</a>',
+            ),
+            (
+                f"{id_num_two.name}.pdf",
+                f'<a href="/doc/{id_num_two.name}/">{id_num_two.name}.pdf</a>',
+            ),
+            (
+                f"{id_num_two.name}-{id_num_two.rev}.txt",
+                f'<a href="/doc/{id_num_two.name}/{id_num_two.rev}/">{id_num_two.name}-{id_num_two.rev}.txt</a>',
+            ),
+            (
+                f"{id_plus.name}",
+                f'<a href="/doc/{id_plus.name}/">{id_plus.name}</a>',
+            ),
+            (
+                f"{id_plus.name}-{id_plus.rev}.txt",
+                f'<a href="/doc/{id_plus.name}/{id_plus.rev}/">{id_plus.name}-{id_plus.rev}.txt</a>',
+            ),
+            (
+                f"{id_plus_end.name}",
+                f'<a href="/doc/{id_plus_end.name}/">{id_plus_end.name}</a>',
+            ),
+            (
+                f"{id_plus_end.name}-{id_plus_end.rev}.txt",
+                f'<a href="/doc/{id_plus_end.name}/{id_plus_end.rev}/">{id_plus_end.name}-{id_plus_end.rev}.txt</a>',
+            ),
+            (
+                f"{id_dot.name}",
+                f'<a href="/doc/{id_dot.name}/">{id_dot.name}</a>',
+            ),
+            (
+                f"{id_dot.name}-{id_dot.rev}.txt",
+                f'<a href="/doc/{id_dot.name}/{id_dot.rev}/">{id_dot.name}-{id_dot.rev}.txt</a>',
+            ),
         ]
 
-        # Some edge cases scraped from existing old draft names
-        for name in [
-            # "draft-odell-8+8", # This fails since + matches the right side of \b
-            # "draft-durand-gse+", # same failure
-            "draft-kim-xcast+-few-2-few",
-            #"draft-ietf-pem-ansix9.17",  # Fails because of not being greedy with . before txt
-        ]:
-            cases.append((name,f'<a href="/doc/{name}/">{name}</a>'))
-
         for input, output in cases:
             #debug.show("(urlize_ietf_docs(input),output)")
             self.assertEqual(urlize_ietf_docs(input), output)
diff --git a/ietf/static/js/ietf.js b/ietf/static/js/ietf.js
index 503a93b97..f8cf82d9b 100644
--- a/ietf/static/js/ietf.js
+++ b/ietf/static/js/ietf.js
@@ -199,12 +199,15 @@ $(function () {
                 .find("h1:visible, h2:visible, h3:visible, h4:visible, h5:visible, h6:visible, .nav-heading:visible")
                 .not(".navskip")
                 .each(function () {
-                    // Some headings have complex HTML in them - only use first part in that case.
-                    const text = $(this)
+                    // Some headings have line breaks in them - only use first line in that case.
+                    const frag = $(this)
                         .html()
-                        .split("<")
-                        .shift()
-                        .trim();
+                        .split("<br")
+                        .shift();
+                    const text = $.parseHTML(frag)
+                        .map(x => $(x)
+                            .text())
+                        .join(" ");
 
                     if (text === undefined || text === "") {
                         // Nothing to do for empty headings.
diff --git a/ietf/templates/doc/document_ballot_content.html b/ietf/templates/doc/document_ballot_content.html
index fb612f371..54f73d8d4 100644
--- a/ietf/templates/doc/document_ballot_content.html
+++ b/ietf/templates/doc/document_ballot_content.html
@@ -105,7 +105,7 @@
                             <div class="card-header bg-danger text-light">
                                 <div>
                                     <b>{{ p.pos.name }}</b>
-                                    ({{ p.discuss_time|date:"Y-m-d" }}{% if not p.for_current_revision %}{% if p.discuss_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
+                                    ({{ p.discuss_time|date:"Y-m-d" }}{% if not p.for_current_revision and p.get_dochistory.rev %}{% if p.discuss_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
                                     {% if p.send_email %}
                                         <i class="bi bi-envelope float-end"
                                               title="Email requested to be sent for this discuss"></i>
@@ -131,7 +131,7 @@
                             <div class="card-header {{ p.pos|pos_to_label_format }}">
                                 <div>
                                     <b>Comment</b>
-                                    ({{ p.comment_time|date:"Y-m-d" }}{% if not p.for_current_revision %}{% if p.comment_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
+                                    ({{ p.comment_time|date:"Y-m-d" }}{% if not p.for_current_revision and p.get_dochistory.rev %}{% if p.comment_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
                                     {% if p.send_email %}
                                         <i class="bi bi-envelope-check float-end"
                                               title="Email requested to be sent for this comment"></i>
@@ -178,9 +178,9 @@
                                 <b>{{ p.pos.name }} </b>
                                 {% if p.pos.blocking and p.discuss %}
                                     <b>[Treat as non-blocking comment]</b>
-                                    ({{ p.discuss_time|date:"Y-m-d" }}{% if not p.for_current_revision %}{% if p.discuss_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
+                                    ({{ p.discuss_time|date:"Y-m-d" }}{% if not p.for_current_revision and p.get_dochistory.rev %}{% if p.discuss_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
                                 {% else %}
-                                    ({{ p.comment_time|date:"Y-m-d" }}{% if not p.for_current_revision %}{% if p.comment_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
+                                    ({{ p.comment_time|date:"Y-m-d" }}{% if not p.for_current_revision and p.get_dochistory.rev %}{% if p.comment_time %} {% endif %}for -{{ p.get_dochistory.rev }}{% endif %})
                                 {% endif %}
                                 {% if p.send_email %}
                                     <i class="bi bi-envelope float-end"
diff --git a/ietf/templates/doc/document_material.html b/ietf/templates/doc/document_material.html
index ca1882829..e1dc91e44 100644
--- a/ietf/templates/doc/document_material.html
+++ b/ietf/templates/doc/document_material.html
@@ -56,7 +56,13 @@
                         {% doc_edit_button 'ietf.doc.views_material.edit_material' name=doc.name action="state" %}
                     {% endif %}
                 </td>
-                <td>{{ doc.get_state.name }}</td>
+                <td>
+                    {% if doc.get_state.name %}
+                        {{ doc.get_state.name }}
+                    {% else %}
+                        <span class="text-muted">(None)</span>
+                    {% endif %}
+                </td>
             </tr>
             {% if other_types %}
                 <tr>
diff --git a/ietf/templates/doc/document_review.html b/ietf/templates/doc/document_review.html
index bf249ff53..113c407fe 100644
--- a/ietf/templates/doc/document_review.html
+++ b/ietf/templates/doc/document_review.html
@@ -25,7 +25,13 @@
                         <td></td>
                         <th scope="row">State</th>
                         <td class="edit"></td>
-                        <td>{{ doc.get_state.name }}</td>
+                        <td>
+                            {% if doc.get_state.name %}
+                                {{ doc.get_state.name }}
+                            {% else %}
+                                <span class="text-muted">(None)</span>
+                            {% endif %}
+                        </td>
                     </tr>
                 {% endif %}
                 {% if other_reviews %}
diff --git a/ietf/templates/group/group_about.html b/ietf/templates/group/group_about.html
index f16fb6b27..41e524c8c 100644
--- a/ietf/templates/group/group_about.html
+++ b/ietf/templates/group/group_about.html
@@ -68,7 +68,9 @@
                         {% if group.charter %}
                             <a href="{% url "ietf.doc.views_doc.document_main" name=group.charter.name %}">
                                 {{ group.charter.name }}-{{ group.charter.rev }}</a>
-                            <span class="badge bg-info">{{ group.charter.get_state.name }}</span>
+                            {% if group.charter.get_state.name %}
+                                <span class="badge bg-info">{{ group.charter.get_state.name }}</span>
+                            {% endif %}
                         {% else %}
                             <span class="text-muted">(None)</span>
                             {% if user|has_role:"Area Director,Secretariat" %}
diff --git a/ietf/templates/iesg/agenda.html b/ietf/templates/iesg/agenda.html
index 9cfab0b1a..629c0946f 100644
--- a/ietf/templates/iesg/agenda.html
+++ b/ietf/templates/iesg/agenda.html
@@ -20,7 +20,7 @@
         {% elif num|sectionlevel == 3 %}
             <h4 class="mt-3" id="sec-{{ num|slugify }}">{{ num }} {{ section.title|safe }}</h4>
         {% endif %}
-        {% if num == "1.4" %}<pre>{{ section.text }}</pre>{% endif %}
+        {% if num == "1.4" %}<pre>{{ section.text|urlize_ietf_docs|linkify }}</pre>{% endif %}
         {% if num >= "2" and num < "5" %}
             {% if num == "2" %}
                 <p class="alert alert-info my-3">
diff --git a/ietf/templates/ipr/details_history.html b/ietf/templates/ipr/details_history.html
index aa1ea8f83..b8fecf780 100644
--- a/ietf/templates/ipr/details_history.html
+++ b/ietf/templates/ipr/details_history.html
@@ -49,7 +49,7 @@
                             {% endif %}
                         </td>
                         <td>{% person_link e.by %}</td>
-                        <td>
+                        <td class="text-break">
                             {% if e.message %}
                                 {% if e.response_due %}<span class="badge bg-info">Response due {{ e.response_due|date:"Y-m-d" }}</span>{% endif %}
                                 {# FIXME: can't do format_history_text, because that inserts a <div> into the <pre>, which is illegal. Need to rework the snippeting. #}
diff --git a/ietf/templates/ipr/details_view.html b/ietf/templates/ipr/details_view.html
index c98329b9f..bdda164a6 100644
--- a/ietf/templates/ipr/details_view.html
+++ b/ietf/templates/ipr/details_view.html
@@ -5,7 +5,7 @@
 {% block title %}IPR Details - {{ ipr.title }}{% endblock %}
 {% block pagehead %}
     <meta name="description"
-          content="IPR disclosure #{{ ipr.ipr_id }}: {{ ipr.title }} ({{ ipr.time|date:'Y' }})">
+          content="IPR disclosure{% if ipr.ipr_id %} #{{ ipr.ipr_id }}{% endif %}: {{ ipr.title }} ({{ ipr.time|date:'Y' }})">
 {% endblock %}
 {% block content %}
     {% origin %}
@@ -170,7 +170,13 @@
         {% endif %}
         <tbody>
             <tr>
-                {% if prev %}<td class="ipr-prev">{{ prev.holder_legal_name }}</td>{% endif %}
+                {% if prev %}
+                    <td class="ipr-prev">
+                        {% if prev.holder_legal_name %}
+                            {{ prev.holder_legal_name }}
+                        {% endif %}
+                    </td>
+                {% endif %}
                 <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">Holder legal name</th>
                 <td class="ipr-this">{{ ipr.holder_legal_name }}</td>
             </tr>
@@ -207,7 +213,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.holder_contact_name }}
+                            {% if prev.holder_contact_name %}
+                                {{ prev.holder_contact_name }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -220,7 +228,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.holder_contact_email|linkify }}
+                            {% if prev.holder_contact_email %}
+                                {{ prev.holder_contact_email|linkify }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -233,14 +243,16 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.holder_contact_info|linebreaks }}
+                            {% if prev.holder_contact_info %}
+                                {{ prev.holder_contact_info|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
                         Holder contact info
                     </th>
                     <td class="ipr-this">
-                        {% if ipr.holder_contact_info %}{{ ipr.holder_contact_info|linebreaks }}{% endif %}
+                        {% if ipr.holder_contact_info %}{{ ipr.holder_contact_info|linkify|linebreaks }}{% endif %}
                     </td>
                 </tr>
             </tbody>
@@ -282,7 +294,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.ietfer_name }}
+                            {% if prev.ietfer_name %}
+                                {{ prev.ietfer_name }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -295,7 +309,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.ietfer_contact_email|linkify }}
+                            {% if prev.ietfer_contact_email %}
+                                {{ prev.ietfer_contact_email|linkify }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -308,14 +324,16 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.ietfer_contact_info|linebreaks }}
+                            {% if prev.ietfer_contact_info %}
+                                {{ prev.ietfer_contact_info|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
                         Other info
                     </th>
                     <td class="ipr-this">
-                        {{ ipr.ietfer_contact_info|linebreaks }}
+                        {{ ipr.ietfer_contact_info|linkify|linebreaks }}
                     </td>
                 </tr>
             </tbody>
@@ -474,7 +492,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.patent_info|linebreaks }}
+                            {% if prev.patent_info %}
+                                {{ prev.patent_info|urlize_ietf_docs|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -483,7 +503,7 @@
                         or Application/File number(s)
                     </th>
                     <td class="ipr-this">
-                        {{ ipr.patent_info|linebreaks }}
+                        {{ ipr.patent_info|urlize_ietf_docs|linkify|linebreaks }}
                     </td>
                 </tr>
             </tbody>
@@ -523,7 +543,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.has_patent_pending|yesno:"Yes,No" }}
+                            {% if prev.has_patent_pending %}
+                                {{ prev.has_patent_pending|yesno:"Yes,No" }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -592,10 +614,12 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {% if prev.licensing.slug == "provided-later" %}
-                                {{ prev.licensing.desc|slice:"2:"|slice:":117" }})
-                            {% else %}
-                                {{ prev.licensing.desc|slice:"2:" }}
+                            {% if prev.licensing.slug %}
+                                {% if prev.licensing.slug == "provided-later" %}
+                                    {{ prev.licensing.desc|slice:"2:"|slice:":117" }})
+                                {% else %}
+                                    {{ prev.licensing.desc|slice:"2:" }}
+                                {% endif %}
                             {% endif %}
                         </td>
                     {% endif %}
@@ -613,7 +637,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.licensing_comments|default:"(No information submitted)"|linebreaks }}
+                            {% if prev.licensing_comments %}
+                                {{ prev.licensing_comments|default:"(No information submitted)"|urlize_ietf_docs|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -666,14 +692,16 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.statement|linebreaks }}
+                            {% if prev.statement %}
+                                {{ prev.statement|urlize_ietf_docs|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
                         Statement
                     </th>
                     <td class="ipr-this">
-                        {{ ipr.statement|linebreaks }}
+                        {{ ipr.statement|urlize_ietf_docs|linkify|linebreaks }}
                     </td>
                 </tr>
             </tbody>
@@ -714,7 +742,9 @@
             <tr>
                 {% if prev %}
                     <td class="ipr-prev">
-                        {{ prev.submitter_name }}
+                        {% if prev.submitter_name %}
+                            {{ prev.submitter_name }}
+                        {% endif %}
                     </td>
                 {% endif %}
                 <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -727,7 +757,9 @@
             <tr>
                 {% if prev %}
                     <td class="ipr-prev">
-                        {{ prev.submitter_email|linkify }}
+                        {% if prev.submitter_email %}
+                            {{ prev.submitter_email|linkify }}
+                        {% endif %}
                     </td>
                 {% endif %}
                 <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -775,7 +807,9 @@
                 <tr>
                     {% if prev %}
                         <td class="ipr-prev">
-                            {{ prev.notes|urlize_ietf_docs|linkify|linebreaks }}
+                            {% if prev.notes %}
+                                {{ prev.notes|urlize_ietf_docs|linkify|linebreaks }}
+                            {% endif %}
                         </td>
                     {% endif %}
                     <th scope="row" class="ipr-label {% if prev %}text-center table-secondary{% endif %}">
@@ -791,4 +825,4 @@
     <p class="my-3 alert alert-info">
         Only those sections of the relevant entry form where the submitter provided information are displayed above.
     </p>
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/ietf/templates/meeting/agenda.html b/ietf/templates/meeting/agenda.html
index d4c9566b2..ea18c9579 100644
--- a/ietf/templates/meeting/agenda.html
+++ b/ietf/templates/meeting/agenda.html
@@ -140,13 +140,13 @@
                                 {% if item.session_keyword %}
                                     <label class="d-none"
                                            aria-label="Select session"
-                                           for="{{ item.session_keyword }}">
+                                           for="{{ item.session_keyword }}-{{ item.slug }}">
                                    </label>
                                     <input type="checkbox"
                                            class="pickview form-check-input"
                                            title="Select session"
                                            name="selected-sessions"
-                                           id="{{ item.session_keyword }}"
+                                           id="{{ item.session_keyword }}-{{ item.slug }}"
                                            value="{{ item.session_keyword }}"
                                            data-filter-keywords="{{ item.filter_keywords|join:',' }}"
                                            data-filter-item="{{ item.session_keyword }}">
@@ -268,7 +268,9 @@
                     {% endif %}
                 </td>
                 <td>
-                    <div class="d-none d-sm-block">{{ item.session.historic_group.historic_parent.acronym }}</div>
+                    {% if item.session.historic_group.historic_parent.acronym %}
+                        <div class="d-none d-sm-block">{{ item.session.historic_group.historic_parent.acronym }}</div>
+                    {% endif %}
                 </td>
                 <td>
                     {% if item.session.historic_group %}
diff --git a/ietf/templates/person/person_link.html b/ietf/templates/person/person_link.html
index 7264bead9..a8e2da9d7 100644
--- a/ietf/templates/person/person_link.html
+++ b/ietf/templates/person/person_link.html
@@ -1,3 +1,6 @@
+{% if email and email == "system@datatracker.ietf.org" or name and name == "(System)" %}
+    <span class="text-muted">(System)</span>
+{% else %}
 <span {% if class %}class="{{ class }}"
       {% endif %}>{% if email or name %}<a {% if class %}class="text-reset"{% endif %}
            title="{% if title %}{{ title }}{% else %}Datatracker profile of {{ name }}.{% endif %}"
@@ -5,4 +8,5 @@
                href="mailto:{{ email|urlencode }}"
                aria-label="Compose email to {{ email }}."
                title="Compose email to {{ email }}.">
-                <i class="bi bi-envelope"></i></a>{% endif %}{% else %}<span class="text-muted">(None)</span>{% endif %}</span>
\ No newline at end of file
+                <i class="bi bi-envelope"></i></a>{% endif %}{% else %}<span class="text-muted">(None)</span>{% endif %}</span>
+{% endif %}
diff --git a/ietf/utils/test_runner.py b/ietf/utils/test_runner.py
index eb380df6f..200ce047c 100644
--- a/ietf/utils/test_runner.py
+++ b/ietf/utils/test_runner.py
@@ -126,6 +126,11 @@ http = urllib3.PoolManager(retries=urllib3.Retry(99, redirect=False))
 
 def vnu_validate(html, content_type="text/html", port=8888):
     "Pass the HTML to the vnu server running on the indicated port"
+    if "** No value found for " in html.decode():
+        return json.dumps(
+            {"messages": [{"message": '"** No value found for" in source'}]}
+        )
+
     gzippeddata = gzip.compress(html)
     try:
         req = http.request(
@@ -183,8 +188,7 @@ def vnu_filter_message(msg, filter_db_issues, filter_test_issues):
     if filter_test_issues and re.search(
         r"""Ceci\ n'est\ pas\ une\ URL|
             ^The\ '\w+'\ attribute\ on\ the\ '\w+'\ element\ is\ obsolete|
-            ^Section\ lacks\ heading|
-            is\ not\ in\ Unicode\ Normalization\ Form\ C""",
+            ^Section\ lacks\ heading""",
         msg["message"],
         flags=re.VERBOSE,
     ):
@@ -193,7 +197,8 @@ def vnu_filter_message(msg, filter_db_issues, filter_test_issues):
     return re.search(
         r"""document\ is\ not\ mappable\ to\ XML\ 1|
             ^Attribute\ 'required'\ not\ allowed\ on\ element\ 'div'|
-            ^The\ 'type'\ attribute\ is\ unnecessary\ for\ JavaScript""",
+            ^The\ 'type'\ attribute\ is\ unnecessary\ for\ JavaScript|
+            is\ not\ in\ Unicode\ Normalization\ Form\ C""",
         msg["message"],
         flags=re.VERBOSE,
     )
diff --git a/ietf/utils/text.py b/ietf/utils/text.py
index 1ef35cc31..9596d192d 100644
--- a/ietf/utils/text.py
+++ b/ietf/utils/text.py
@@ -2,13 +2,16 @@
 # -*- coding: utf-8 -*-
 
 
-import bleach
+import bleach  # type: ignore
+import copy
 import email
 import re
 import textwrap
 import tlds
 import unicodedata
 
+from django.core.validators import URLValidator
+from django.core.exceptions import ValidationError
 from django.utils.functional import keep_lazy
 from django.utils.safestring import mark_safe
 
@@ -17,14 +20,32 @@ import debug                            # pyflakes:ignore
 from .texescape import init as texescape_init, tex_escape_map
 
 tlds_sorted = sorted(tlds.tld_set, key=len, reverse=True)
-protocols = bleach.sanitizer.ALLOWED_PROTOCOLS
+protocols = copy.copy(bleach.sanitizer.ALLOWED_PROTOCOLS)
 protocols.append("ftp")  # we still have some ftp links
+validate_url = URLValidator()
+
+
+def check_url_validity(attrs, new=False):
+    url = attrs[(None, 'href')]
+    try:
+        if url.startswith("http"):
+            validate_url(url)
+    except ValidationError:
+        return None
+    return attrs
+
+
 bleach_linker = bleach.Linker(
+    callbacks=[check_url_validity],
     url_re=bleach.linkifier.build_url_re(tlds=tlds_sorted, protocols=protocols),
     email_re=bleach.linkifier.build_email_re(tlds=tlds_sorted), # type: ignore
     parse_email=True
 )
 
+tags = copy.copy(bleach.sanitizer.ALLOWED_TAGS)
+tags.remove("a")
+bleach_cleaner = bleach.sanitizer.Cleaner(tags=tags, protocols=protocols)
+
 
 @keep_lazy(str)
 def xslugify(value):