Hey there. I have problems with colors. There is black overlapping blues/greens as shown on the image. This spiral is done with the same color airbrush style so the more saturated the area is the more black color percent appears. I have installed it 2 weeks ago and it was working well for kinda half that time. Suddenly that problem appeared without any idea why. I have tried reinstalling both graphic drivers and photoshop but doesn't help.
See also: http://forums.adobe.com/message/5006842
Good news everyone! The AMD Catalyst 13.2 beta 4 driver finally fixes the problem, if you want to go for the very latest instead of downgrading.
I've been running the Catalyst 13.2 beta 4 driver for a few days now. It seems pretty stable.