http://bugs.winehq.org/show_bug.cgi?id=20808
--- Comment #11 from Roderick Colenbrander thunderbird2k@gmail.com 2009-12-28 16:03:00 --- It seems I disable the composite code fully in the hack I posted. The window hack might not work properly at all. I created for an app we had to get running on Linux and it had to work on drivers which didn't support composite+gl well yet. If you don't use the hack window rendering should work fine (unless it really can't open xcomposite). Try if other windowed opengl apps like google earth or so work well.