Ray, pardon my ignorance, but how would permissions affect graphics processing? I'm having the same gray-out problems as @composed, as I described w/ images attached over on this thread:
http://tinyurl.com/cqpl8g
This is on a new 15" MacBook Pro with the dual video cards (nVidia GeForce 9400M + 9600M GT) and max RAM, no external monitor, working only with 2D line drawings and as much of the smartcursor fireworks turned off as I can bear. Is it that even the latest hardware can't satisfy the software? But then why isn't everyone having this problem?
Sorry to have more questions than answers; just not entirely glad to have upgraded from 12.5.