diff --git a/django/contrib/admin/static/admin/css/forms.css b/django/contrib/admin/static/admin/css/forms.css
index 76e2d493e9dd..6d13d433500e 100644
--- a/django/contrib/admin/static/admin/css/forms.css
+++ b/django/contrib/admin/static/admin/css/forms.css
@@ -102,7 +102,7 @@ fieldset .inline-heading,
 }
 
 .aligned legend {
-    float: left;
+    float: inline-start;
 }
 
 .aligned legend,
@@ -148,15 +148,11 @@ form .aligned ul {
 }
 
 form .aligned div.radiolist {
-    display: inline-block;
+    display: block;
     margin: 0;
     padding: 0;
 }
 
-form .aligned fieldset div.help {
-    margin-left: 0;
-}
-
 form .aligned p.help,
 form .aligned div.help {
     margin-top: 0;
diff --git a/django/contrib/admin/static/admin/css/responsive.css b/django/contrib/admin/static/admin/css/responsive.css
index fbf0d88b4028..93abf79953c3 100644
--- a/django/contrib/admin/static/admin/css/responsive.css
+++ b/django/contrib/admin/static/admin/css/responsive.css
@@ -560,6 +560,10 @@ input[type="submit"], button {
         margin-top: 5px;
     }
 
+    form .aligned fieldset div.flex-container {
+        display: unset;
+    }
+
     /* Related widget */
 
     .related-widget-wrapper {
diff --git a/django/contrib/admin/templates/admin/auth/user/change_password.html b/django/contrib/admin/templates/admin/auth/user/change_password.html
index 08d191b765e4..d3e546d28d89 100644
--- a/django/contrib/admin/templates/admin/auth/user/change_password.html
+++ b/django/contrib/admin/templates/admin/auth/user/change_password.html
@@ -40,7 +40,7 @@
 
 <div class="form-row">
   {{ form.usable_password.errors }}
-  <fieldset class="flex-container">{{ form.usable_password.legend_tag }} {{ form.usable_password }}</fieldset>
+  <fieldset>{{ form.usable_password.legend_tag }} {{ form.usable_password }}</fieldset>
   {% if form.usable_password.help_text %}
   <div class="help"{% if form.usable_password.id_for_label %} id="{{ form.usable_password.id_for_label }}_helptext"{% endif %}>
     <p>{{ form.usable_password.help_text|safe }}</p>
diff --git a/django/contrib/admin/templates/admin/includes/fieldset.html b/django/contrib/admin/templates/admin/includes/fieldset.html
index aa8d94b41d30..1fd303ea823e 100644
--- a/django/contrib/admin/templates/admin/includes/fieldset.html
+++ b/django/contrib/admin/templates/admin/includes/fieldset.html
@@ -11,7 +11,7 @@
         <div class="form-row{% if line.fields|length == 1 and line.errors %} errors{% endif %}{% if not line.has_visible_field %} hidden{% endif %}{% for field in line %}{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% endfor %}">
             {% if line.fields|length == 1 %}{{ line.errors }}{% else %}<div class="flex-container form-multiline">{% endif %}
             {% for field in line %}
-                {% if field.is_fieldset %}<fieldset class="flex-container"{% if field.field.help_text %} aria-describedby="{{ field.field.id_for_label }}_helptext"{% endif %}>{{ field.label_tag }}{% endif %}
+                {% if field.is_fieldset %}<fieldset{% if field.field.help_text %} aria-describedby="{{ field.field.id_for_label }}_helptext"{% endif %}>{{ field.label_tag }}{% endif %}
                 <div>
                     {% if not line.fields|length == 1 and not field.is_readonly %}{{ field.errors }}{% endif %}
                         <div class="flex-container{% if not line.fields|length == 1 %} fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}{% endif %}{% if field.is_checkbox %} checkbox-row{% endif %}">
diff --git a/django/db/backends/sqlite3/features.py b/django/db/backends/sqlite3/features.py
index 668a53928dd6..ed24341b5e6c 100644
--- a/django/db/backends/sqlite3/features.py
+++ b/django/db/backends/sqlite3/features.py
@@ -157,6 +157,7 @@ def max_query_params(self):
         32766) or lowered per connection at run-time with
         setlimit(SQLITE_LIMIT_VARIABLE_NUMBER, N).
         """
+        self.connection.ensure_connection()
         return self.connection.connection.getlimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER)
 
     @cached_property
diff --git a/docs/intro/tutorial02.txt b/docs/intro/tutorial02.txt
index 23bf6c4c94dc..8f99965a47e8 100644
--- a/docs/intro/tutorial02.txt
+++ b/docs/intro/tutorial02.txt
@@ -308,7 +308,6 @@ database:
     Operations to perform:
       Apply all migrations: admin, auth, contenttypes, polls, sessions
     Running migrations:
-      Rendering model states... DONE
       Applying polls.0001_initial... OK
 
 The :djadmin:`migrate` command takes all the migrations that haven't been
diff --git a/docs/releases/6.0.1.txt b/docs/releases/6.0.1.txt
index 36e533a88871..790fa76e997e 100644
--- a/docs/releases/6.0.1.txt
+++ b/docs/releases/6.0.1.txt
@@ -20,3 +20,10 @@ Bugfixes
 * Fixed a bug where management command colorized help (introduced in
   Python 3.14) ignored the :option:`--no-color` option and the
   :envvar:`DJANGO_COLORS` setting (:ticket:`36376`).
+
+* Fixed a regression in Django 6.0 that caused
+  :meth:`~django.db.models.query.QuerySet.bulk_create` to crash
+  when introspecting the connection on SQLite (:ticket:`36818`).
+
+* Fixed a visual regression in Django 6.0 for admin form fields grouped under a
+  ``<fieldset>`` in Safari (:ticket:`36807`).
diff --git a/docs/topics/migrations.txt b/docs/topics/migrations.txt
index 90034b0dfeed..f68f512cdd35 100644
--- a/docs/topics/migrations.txt
+++ b/docs/topics/migrations.txt
@@ -135,7 +135,6 @@ database to make sure they work as expected:
     Operations to perform:
       Apply all migrations: books
     Running migrations:
-      Rendering model states... DONE
       Applying books.0003_auto... OK
 
 Once the migration is applied, commit the migration and the models change
diff --git a/tests/auth_tests/test_views.py b/tests/auth_tests/test_views.py
index a3863b6233c0..d7d59d9fc033 100644
--- a/tests/auth_tests/test_views.py
+++ b/tests/auth_tests/test_views.py
@@ -1555,8 +1555,7 @@ def test_user_with_usable_password_change_password(self):
         # Usable password field.
         self.assertContains(
             response,
-            '<fieldset class="flex-container">'
-            "<legend>Password-based authentication:</legend>",
+            "<fieldset><legend>Password-based authentication:</legend>",
         )
         # Submit buttons
         self.assertContains(response, '<input type="submit" name="set-password"')
diff --git a/tests/backends/sqlite/test_features.py b/tests/backends/sqlite/test_features.py
index 95e060fbccea..45c3ec9f2c95 100644
--- a/tests/backends/sqlite/test_features.py
+++ b/tests/backends/sqlite/test_features.py
@@ -1,3 +1,4 @@
+import copy
 import sqlite3
 from unittest import mock, skipUnless
 
@@ -29,3 +30,13 @@ def test_max_query_params_respects_variable_limit(self):
         finally:
             connection.connection.setlimit(limit_name, current_limit)
         self.assertEqual(connection.features.max_query_params, current_limit)
+
+    def test_max_query_params_without_established_connection(self):
+        new_connection = connection.copy()
+        new_connection.settings_dict = copy.deepcopy(connection.settings_dict)
+        self.assertIsNone(new_connection.connection)
+        try:
+            result = new_connection.features.max_query_params
+            self.assertIsInstance(result, int)
+        finally:
+            new_connection._close()
diff --git a/tests/model_fields/models.py b/tests/model_fields/models.py
index 800a9ff5aa81..cdf3c00080c9 100644
--- a/tests/model_fields/models.py
+++ b/tests/model_fields/models.py
@@ -636,7 +636,6 @@ class GeneratedModelNull(models.Model):
         expression=Lower("name"),
         output_field=models.CharField(max_length=10),
         db_persist=True,
-        null=True,
     )
 
     class Meta:
@@ -649,7 +648,6 @@ class GeneratedModelNullVirtual(models.Model):
         expression=Lower("name"),
         output_field=models.CharField(max_length=10),
         db_persist=False,
-        null=True,
     )
 
     class Meta: