Since a few days (possibly caused by the fix of bug 25289), flaggedrevs.css is being loaded after the site and user CSS.
This has broken 1 site-wide customization on dewiki (cf. http://de.wikipedia.org/w/index.php?title=MediaWiki:Monobook.css&diff=81917389&oldid=81917139) and an unknown number of user customizations.
Version: unspecified
Severity: major