https://www.mediawiki.org/wiki/MediaWiki_1.21/wmf6#Most_important_changes
This week and next week we're deploying a new version of MediaWiki to
your wiki, as usual. This upgrade is now out to
mediawiki.org and
test2.wikipedia.org in case you want to try it out before it comes to
your wiki -- for instance, you could log in and put your user scripts in
your userspace to make sure everything still works. Key changes:
Display changes:
* The message "wikimedia-editpage-tos-summary" (displayed below the edit
form) has been removed; if it was customized on your wiki, its contents
will have to be merged with "wikimedia-copyrightwarning".
* We changed the wording of the protectedpagetext message to include
moving and other actions.
* MediaWiki:Contributions now reflects the gender of the user.
* We're displaying IPv6 addresses more nicely.
Fixes:
* Bogus page creation e-mail notifications were being sent when a page
was actually being deleted. We think we've fixed that.
* We fixed the mobile version of the website so that, if you disable
images, it doesn't also strip other content.
* Your "enhanced changelist" displays minor/bot changes better.
New:
* There's a new DynamicSidebar - tell us if your sidebar acts weird.
* TimedMediaHandler now supports embedding a smaller audio player of
35-pixel width, and reorders the controls so that small players get a
play/pause button and volume first.
* In WebFonts we've added the Gubbit font, replacing Kedage, for Kannada.
As always, more at
https://www.mediawiki.org/wiki/MediaWiki_1.21/wmf6
and deployment dates at
https://www.mediawiki.org/wiki/MediaWiki_1.21/Roadmap . Please let us
know of any bugs! Thank you for your feedback!
--
Sumana Harihareswara
Engineering Community Manager
Wikimedia Foundation