http://bugs.winehq.org/show_bug.cgi?id=11991
--- Comment #7 from Roderick Colenbrander thunderbird2k@gmx.net 2008-05-04 15:31:43 --- It appears that X11DRV_SET_DRAWABLE overrides the pixel format set on the physDev. This appears to cause the crash as for some reason the pixel format is set to 0 which is an invalid value. I'm not sure yet why it is happening it could be that no X11 window has been allocated yet or so.