http://bugs.winehq.org/show_bug.cgi?id=12557
--- Comment #26 from Roderick Colenbrander thunderbird2k@gmx.net 2008-05-02 02:41:43 --- Likely my latest patch (http://www.winehq.org/pipermail/wine-patches/2008-May/054435.html) fixes the issue. Basically DirectDraw never requested a depth buffer. Before it worked because WineD3D was only able to use a single pixel format and on that one we always had a depth buffer.