http://bugs.winehq.org/show_bug.cgi?id=22684
--- Comment #7 from Roderick Colenbrander thunderbird2k@gmail.com 2010-05-17 08:54:11 --- I can confirm the issue on Nvidia. I have absolutely no idea why it occurs on Nvidia and not on ATI since the opengl functionality since I would expect that the same code paths will get entered since the GPUs offer the same opengl extensions.