Bug#559956: Gnometris graphics glitch at startup

[lord licorice]

Package: gnome-games
Version: 1:2.28.1-1

When I start gnometris and immediately start a new game, everything's
fine. If, however, I move the window before starting a new game, and
then start a new game, the board will initially be drawn on my screen
where the window was BEFORE I moved it.

To erase the corrupted screen area I have to move a window through it.
The parts of the corrupted area that are in the gnometris window,
however, must be pushed off the sides of the screen (by moving the
gnometris window) to return to normal.

Here's a screenshot.
http://img44.imageshack.us/img44/9851/screenshothy.png

This only happens with starting a new game; pausing and unpausing is
fine. Also it happens when resizing the window and
maximizing/minimizing the window.

I'm on debian sid running XFCE. I have an ATI card and I'm running the
open source radeon driver.
Linux brians-laptop 2.6.32-0.slh.1-sidux-686 #1 SMP PREEMPT Thu Dec 3
libc6 Version: 2.10.2-2