and desktop displays (configurable with $wgResponsiveImages).
* Added new backend to represent and store information about sites and site
specific configuration.
+* jQuery upgraded from 1.8.2 to 1.8.3.
* jQuery UI upgraded from 1.8.23 to 1.8.24.
* Added separate fa_sha1 field to filearchive table. This allows sha1
searches with the api in miser mode for deleted files.
* (bug 40876) Icon for PSD (Adobe Photoshop) file types.
* (bug 40641) Implemented Special:Version/Credits with a list of contributors.
* (bug 7851) Implemented one-click AJAX patrolling.
+* The <data>, <time>, <meta>, and <link> elements are allowed within WikiText
+ for use with Microdata.
=== Bug fixes in 1.21 ===
* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
actually sorted.
* (bug 2865) User interface HTML elements don't use lang attribute
(completed the fix by adding the lang attribute to firstHeading)
+* (bug 42173) Removed namespace prefixes on Special:UncategorizedCategories.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat, see docs/contenthandler.txt