production.
=== Configuration changes in 1.21 ===
+* (bug 29374) $wgVectorUseSimpleSearch is now enabled by default.
+* Deprecated $wgAllowRealName is removed. Use $wgHiddenPrefs[] = 'realname' instead
=== New features in 1.21 ===
* Added ContentHandler facility to allow extensions to support other content than wikitext.
See docs/contenthandler.txt for details.
=== Bug fixes in 1.21 ===
+* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
+* (bug 40352) fixDoubleRedirects.php should support interwiki redirects.
+* (bug 9237) SpecialBrokenRedirect should not list interwiki redirects.
+* (bug 34960) Drop unused fields rc_moved_to_ns and rc_moved_to_title from recentchanges table.
+* (bug 32951) Do not register internal externals with absolute protocol,
+ when server has relative protocol.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat, see docs/contenthandler.txt
* action=edit and action=parse now support contentmodel and contentformat parameters to control the interpretation of
page content; See docs/contenthandler.txt for details.
+* (bug 35693) ApiQueryImageInfo now suppresses errors when unserializing metadata.
=== Languages updated in 1.21 ===
+MediaWiki supports over 350 languages. Many localisations are updated
+regularly. Below only new and removed languages are listed, as well as
+changes to languages because of Bugzilla reports.
=== Other changes in 1.21 ===
== Compatibility ==
-Since version 1.20, MediaWiki requires PHP 5.3.2. PHP 4 is no longer supported.
+MediaWiki 1.21 requires PHP 5.3.2. PHP 4 is no longer supported.
MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
support for them is somewhat less mature. There is experimental support for IBM