http://bugs.winehq.org/show_bug.cgi?id=12053
--- Comment #7 from Austin English austinenglish@gmail.com 2011-08-09 13:10:16 CDT --- IIRC, Metacity and FVWM must pass any test changes (not sure of versions, this was a while back on IRC.
In a few bug reports he's mentioned testing on KDE as well.
Though should ask him when he's back from vacation.