* (bug 39635) PostgreSQL LOCK IN SHARE MODE option is a syntax error.
* (bug 36329) Accesskey tooltips for Firefox 14 on Mac should use "ctrl-option-" prefix.
* (bug 32552) Drop unused database field cat_hidden from table category.
+* (bug 24502) Do not allow multiple language links to the same language.
* (bug 40214) Category pages no longer use deprecated "width" HTML attribute.
* (bug 39941) Add missing stylesheets to the installer pages
* In HTML5 mode, allow new input element types values (such as color, range..)
+* (bug 40353) SpecialDoubleRedirect should support for interwiki redirects.
=== API changes in 1.20 ===
* (bug 34316) Add ability to retrieve maximum upload size from MediaWiki API.
* Use of __DIR__ instead of dirname( __FILE__ ).
* OutputPage::wrapWikiMsg() no longer supports the 'options' parameter. It was
not used and complicated migration to Message class.
+* Live preview functionality has been improved and moved into the
+ 'mediawiki.action.edit.preview' module. The old 'mediawiki.legacy.preview' module
+ has been removed.
== Compatibility ==