http://bugs.winehq.org/show_bug.cgi?id=11012
--- Comment #11 from Roderick Colenbrander thunderbird2k@gmx.net 2008-08-14 17:01:26 --- A long time ago we had opengl / gdi mixing issues where they drew over each other but it has been fixed a while ago. This is something else and I don't know what.