http://bugs.winehq.org/show_bug.cgi?id=12300
--- Comment #3 from Roderick Colenbrander thunderbird2k@gmx.net 2008-04-01 05:45:57 --- This sounds like a ATI driver bug as also no nvidia users have reported this problem. We aren't doing much emulation in our opengl driver (we directly pass everything to libGL.so), so it is mostly likely a driver bug which wasn't hit in previous WoW versions. Also try to use an older driver version to see if the problem goes away then.