[George Heredia]

I just had the same issue. Found another blog that talked about it and rolled it back as well. However, I also found that there is a video card recall on iMacs that use the AMD 6970M video cards. Supposedly for different video issues yet I think there is probably something related there too.

After I rolled back I ma having issues with Premiere Pro CC hanging… hitting space bar will do nothing. Going to try some additional tweaks tomorrow, but I am also contacting Apple to find out about getting a new video card. They’ve known about the video issues since at least August… ugh…