http://bugs.winehq.org/show_bug.cgi?id=14975
--- Comment #33 from Roderick Colenbrander thunderbird2k@gmx.net 2008-11-09 14:02:38 --- The issue was that WoW required an alpha channel for this effect but didn't request one. It would have been a single line fix for WoW its win32 opengl code. The log would show if they fixed this issue which is very easy for me to see.