= MediaWiki release notes =
-Security reminder: MediaWiki does not require PHP's register_globals
-setting since version 1.2.0. If you have it on, turn it '''off''' if you can.
+Security reminder: MediaWiki does not require PHP's register_globals. If you
+have it on, turn it '''off''' if you can.
== MediaWiki 1.21 ==
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 ===
+* (bug 34876) jquery.makeCollapsible has been improved in performance.
* 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 controll the interpretation of
+* 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 or later.
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
== Upgrading ==
1.21 has several database changes since 1.20, and will not work without schema
-updates.
+updates. Note that due to changes to some very large tables like the revision
+table, the schema update may take quite long (minutes on a medium sized site,
+many hours on a large site).
If upgrading from before 1.11, and you are using a wiki as a commons
repository, make sure that it is updated as well. Otherwise, errors may arise