http://bugs.winehq.org/show_bug.cgi?id=13195
--- Comment #20 from Roderick Colenbrander thunderbird2k@gmx.net 2008-05-31 10:48:04 --- The main issue seems to be that SetPixelFormat isn't called for HDC=b448 and that is what causes the problems (for that reason there is no X11 window for it and no pixel format). It might be related to the DescribePixelFormat call which fails. Perhaps DescribePixelFormat on Windows is buggy and does something strange for an 'invalid' pixel format. We would need a test case for that.