http://bugs.winehq.org/show_bug.cgi?id=1347
------- Additional Comments From Speeddymon@gmail.com 2007-16-03 08:57 ------- This appears to be similar to a display bug that happens under windows occasionally when switching from a fullscreen game that grabs control of the mouse back to windows. It is not related however.
I wouldnt say that this is a clipping issue, but more of a refreshing issue, however if the window is not taking fullscreen it shouldnt be writing to parts of the screen that it has not covered, like the panel..
You said this happens with KDE, does it also happen with other WM's?