I have updated my Windows 7 x64 workstation, equipped with VisionTek ATI Radeon HD 5670, to use the new ATI Catalyst 12.6 release, just out. I upgraded from their last stable release, 12.2.
Early indications, with just a few hours testing, are that the GPU-enhanced features of Photoshop CS6 x64 appear to work OK with this ATI driver version:
New Problems Discovered
Questionable Things With Workarounds (Geek Stuff):
Keep in mind I only updated to this version of the driver earlier today, so I haven't got a lot of experience with it yet. Early indications are that it's not bad, but if you're already on Catalyst 12.2 and you have a stable system, I see no reason to upgrade.
The new version does not appear to be faster, and there is the one new issue where there's a slight transparency glitch in 16 bits/channel documents showing on the screen after a canvas rotation.
I'll update this thread if I find more things to report. Given the new transparency issue and the fact that I had no problems with 12.2, I'll probably test with 12.6 for a few days then drop back to 12.2.
You're very welcome, folks. Thanks for taking the time to send your thoughts, and for your contributions here as well.
I've logged one full day of hard use including Photoshop and many other tasks, and I've seen zero glitches (outside the one I mentioned above, which is pretty minor) with the Catalyst 12.6 release.