G5 2,7 GHz with radeon 9600XT 128 MB VRAM. Sometimes you see that there is a "jack" in the screen where the upper and the lower part isn't align as they should. It's only for a brief second so it's not that bad. And I've also seen graphical errors where some things are a grey mass.

But the game works like a charm so the errors are visible because everything else works fine :) Great work!