Some time ago I wrote about instant display switching using the ATI driver for Linux.
I also mentioned I had some very annoying artefacts in the lower right corner of my screen with the drivers that are supporting OpenSUSE 10.3.
Guess what? The latest release from ATI, version 8.1, fixes all this and also (for me) improves performance a great deal. So, hop over to ATI and select your card, or click this link to download the 8.1 version directly.
Apart from the screen corruption, problems with suspend to RAM have been fixed as well. Three cheers for the ATI guys!