Can anyone here confirm if they fixed OpenGL or not? I went back to 10.4 before testing that particular aspect of the new drivers. Getting DisplayPort Link Failure errors (which I've never had before) due to the new drivers pissed me off to the point that I didn't want to deal with them further.
I did test Flash, though. My video RAM still downclocks from 1000MHz to 900MHz when I play a flash video (or play a video with any DXVA codec), which causes my secondary monitors to flicker. I can't believe this is STILL an issue...
My displayport has flickered and failed with every driver since 10.4a for me, 10.9 being the worst of the mess of drivers.
I was beginning to think that perhaps my bizlink adapter was on its way out, but yesterday I reverted back to 10.4a and I haven't had a single flicker yet. The flicker wasn't all that bad where I experienced it once or twice a day with 10.5-10.8. Once 10.9 was installed, I dealt with it about 7-10 times a day.