Hi everyone,
Sam has created the wmf/1.20wmf1 branch and deployed it to test2.wikipedia.org and mediawiki.org. So, please, go for and test!
Oh, btw, enjoy the pretty new diff colors! :) http://www.mediawiki.org/w/index.php?title=MediaWiki_1.19%2FRoadmap%2Fstatus...
Rob