Well that one is certainly supposed to work, I use a Radeon 9600 Pro here for my main development system.

Is there any chance that you have overclocked the card? Or is it possible that you have heard any strange noises from inside there that might indicate the fan on the card is not working properly?

I'm also not able to reproduce your other problem with display artifacts over here, and that's another one that I haven't heard before also...

- Michael