=== New features in 1.20 ===
* Added TitleIsAlwaysKnown hook which gets called when determining if a page exists.
+* Added NamespaceIsMovable hook which gets called when determining if pages in a
+ certain namespace can be moved.
* (bug 32341) Add upload by URL domain limitation.
* &useskin=default will now always display the default skin. Useful for users with a
preference for the non-default skin to look at something using the default skin.
* (bug 22887) Add warning and tracking category for preprocessor errors
* (bug 31704) Allow selection of associated namespace on the watchlist
* (bug 5445) Now remove autoblocks when a user is unblocked.
+* Added $wgLogExceptionBacktrace, on by default, to allow logging of exception
+ backtraces.
+* Added device detection for determining device capabilities.
+* QUnit.newMwEnvironment now supports passing a custom setup and/or teardown function.
+ Arguments signature has changed. First arguments is now an options object of which
+ 'config' can be a property. Previously 'config' itself was the first and only argument.
+* New getCreator and getOldestRevision methods added to WikiPage class
=== Bug fixes in 1.20 ===
* (bug 30245) Use the correct way to construct a log page title.
* (bug 30410) Removed deprecated $wgFilterCallback and the 'filtered' API error.
* (bug 32604) Some messages needs escaping of wikitext inside username
* (bug 36537) Rename wfArrayToCGI to wfArrayToCgi for consistency with wfCgiToArray.
+* (bug 25946) The message on the top of Special:RecentChanges is now displayed
+ in user language instead of content language
=== API changes in 1.20 ===
* (bug 34316) Add ability to retrieve maximum upload size from MediaWiki API.