http://bugs.winehq.org/show_bug.cgi?id=31766
--- Comment #2 from Alexandre Julliard julliard@winehq.org 2012-09-24 04:40:35 CDT --- I see, it's the app that's painting all over the screen. It's reading the contents of the root window into a bitmap much larger than the header area, blending the header into it, and re-blitting the whole thing. That's clearly broken behavior on the app part, but it doesn't explain why we would get garbage in the bitmap.