Issue #3240960 by andypost: \Drupal\KernelTests\Core\Render\Element\ActionsTest::getFormId() causes deprecations on PHP 8.1

Issue #3231731 by phenaproxima, larowlan, seanB: Use Content-Type header from oEmbed thumbnail GET request when determining the file extension

Issue #3240955 by andypost: \Drupal\media\Plugin\Filter\MediaEmbed::applyPerEmbedMediaOverrides() triggers deprecations in PHP 8.1

Issue #3240958 by andypost, alexpott: template_preprocess_locale_translation_last_check() causes deprecations on PHP 8.1

Issue #3240888 by andypost, alexpott: Using Prophecy to implement Serializable will cause deprecations on PHP 8.1

Issue #3240905 by alexpott: \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationSession can cause deprecations in PHP 8.1

Issue #3240800 by alexpott: Creating an configuration entity via new ConfigEntityClass() triggers deprecations in PHP 8.1, use ConfigEntityClass::create() instead

Issue #3239436 by alexpott, danflanagan8, longwave: Cannot run \Drupal\Tests\layout_builder\FunctionalJavascript\LayoutBuilderDisableInteractionsTest locally because it tests error messages from chromedriver

Issue #3240364 by andypost: \Drupal\Tests\system\Functional\Pager\PagerTest::testMultiplePagers() causes deprecations on PHP 8.1

Issue #3240167 by andypost, alexpott, daffie, larowlan: \Drupal\comment\CommentStorage::getMaxThread() and \Drupal\comment\Entity\Comment::getThread() cause deprecations on PHP 8.1

Issue #3240180 by alexpott, andypost, daffie: \Drupal\user\Entity\User::getEmail() can return NULL causing deprecations in PHP 8.1

Issue #3240455 by alexpott, daffie: Fix Drupal\Tests\content_translation\Functional\ContentTranslationSettingsTest so it does not trigger deprecations on PHP 8.1

Issue #3240174 by alexpott, andypost, daffie: \Drupal\config_translation\FormElement\Textarea() can cause deprecations on PHP 8.1

Issue #3240247 by alexpott, daffie: \Drupal\filter\Entity\FilterFormat::$name with a NULL value causes deprecations in PHP 8.1

Issue #3240361 by andypost, alexpott: \Drupal\user\Entity\User::checkExistingPassword() causes deprecations on PHP 8.1

Issue #3240456 by alexpott, andypost, daffie: Allow E_DEPRECATED deprecations to be skipped so we can test on PHP 8.1

Issue #3240182 by alexpott, daffie, dagmar, andypost: \Drupal\dblog\Controller\DbLogController::createLink() can cause deprecations on PHP 8.1

Issue #3211622 by Gauravmahlawat, mherchel, kiran.kadam911, rikki_iki: Olivero: Text can be cut off at mobile if site-branding text goes to two lines

Issue #3240362 by andypost: \Drupal\tour\TipPluginBase::getLocation() causes deprecations on PHP 8.1

Issue #3240148 by alexpott: \Drupal\aggregator\Entity\Item::getLink() can cause deprecations on PHP 8.1

Issue #3072374 by kjay, thierrydallacroce, Gayathri J, chetanbharambe, webchick, markconroy, shaal: Change "Recipe category" to a select drop-down vs. autocomplete field

Issue #2817081 by nod_, Baysaa, rensingh99, AndyF, amoebanath, alexpott, lauriii, andrewmacpherson: Show 'Edit summary' links on multi-value long text field with summary

Issue #3226010 by mariohernandez, kostyashupenko, Gauravmahlawat, mherchel: Olivero: Skip link fails accessibility color test on hover

Issue #3240171 by andypost, alexpott, larowlan: \Drupal\comment\Entity\Comment::getSubject() can cause deprecations on PHP 8.1

Issue #3240186 by alexpott, daffie: \Drupal\field\Plugin\migrate\source\d6\Field::prepareRow() can cause deprecations on PHP 8.1

Issue #3240201 by andypost, daffie: \Drupal\Tests\Component\Gettext\PoStreamWriterTest::setUp() causes deprecations on PHP 8.1

Issue #3240194 by andypost: \Drupal\KernelTests\Core\Routing\RouteProviderTest::testDuplicateRoutePaths can cause deprecations on PHP 8.1

Issue #3240185 by alexpott: \Drupal\Tests\field\Functional\FieldDefaultValueCallbackTest causes deprecations on PHP 8.1

Issue #3240183 by alexpott: \Drupal\Tests\editor\Functional\EditorAdminTest fails on PHP 8.1 due to deprecations

Issue #3240181 by alexpott: \Drupal\datetime\DateTimeComputed::getValue() causes deprecations on PHP 8.1

Issue #3240173 by alexpott, andypost: \Drupal\KernelTests\Core\Config\ConfigImporterTest::testIsInstallable() can cause deprecations on PHP 8.1

Issue #3240165 by alexpott: \Drupal\block\Plugin\migrate\process\BlockTheme causes deprecations on PHP 8.1

Issue #3239860 by alexpott, lauriii: \Drupal\Core\Template\TwigExtension::renderVar() can result in deprecations in PHP 8.1

Issue #3194669 by andrewmacpherson, mherchel, m4olivei, lauriii, mgifford: Misuse of explicit colour for active pager item in -ms-high-contrast media query

Issue #3228801 by mherchel, Indrajith KB, kostyashupenko, Gauravmahlawat, ckrina: Olivero's wide dropdown hover states are broken

Issue #3240191 by andypost, alexpott: \Drupal\KernelTests\KernelTestBase::bootKernel() causing deprecations in PHP 8.1