https://bugs.freedesktop.org/show_bug.cgi?id=33371
--- Comment #11 from Lars Wendler polynomial-c@gentoo.org 2011-08-04 08:42:26 PDT --- (In reply to comment #10)
I was able to reproduce the problem, but for me it's fixed with current Mesa Git master and 7.11 branches. Make sure your 32 bit r600g is up to date, though you might also need a newer kernel / X driver.
In the worst case, turning off colour tiling might work around the problem.
I've just tested zsnes with gallium r600 from mesa-7.11 and the problem seems to be gone.