http://bugs.winehq.org/show_bug.cgi?id=26863
--- Comment #5 from Night Nord NightNord@gmail.com 2011-04-20 15:31:32 CDT --- 1) to track issue in AppDB (tests are sinking too fast by dozens of all-works nvidia tests). 2) to prevent others from posting similar bug ;)
Anyway, we can't know for sure that this is definitely driver's bug unless AMD will confirm and fix it. It could be wine bug too (probability is small, but it could be) and other drivers (read: nvidia) just have some magic workaround about it.