http://bugs.winehq.org/show_bug.cgi?id=16059
--- Comment #4 from bogdanb bogdanb+bugs.winehq.org@gmail.com 2008-11-18 04:26:53 --- I've had Compiz doing the exact same things with every program I've got for months. Wine's is the only one that disappears, and it disappears all the time.
Fallout might be to blame (it crashes often enough in other situations), or even some weird condition in the video driver. But at the very least we could find out exactly what causes it, but I'm a Wine noob so I don't even know where to start.