http://bugs.winehq.org/show_bug.cgi?id=20380
--- Comment #19 from Roderick Colenbrander thunderbird2k@gmail.com 2009-10-19 12:08:00 --- Err, I forgot that you (Wylda) are using Nvidia (somehow thought you were using ATI). Could you try to add the line: Option "RenderAccel" "0" in the screen / device section of your xorg.conf in order to disable hardware accelerated XRender. This way the Nvidia driver should fall back to software. I wonder if the issue still occurs then.