So I got my MBP fixed from Apple a year ago because it was faulty, they replaced the logic board. Since then it has been flawless. However, since updating to 10.8.1 it froze today, it was a strange freeze. The cursor could still be moved but there was no responsiveness and there were some graphical glitches, it seemed to be a little artifacting but I don't see why. It has been flawless for over a year so it seems coincidental. I guess I'm looking for a little assurance by someone experiencing something similar. Does anyone know if there is something I can do to check the problem? I repaired and verified permissions so it isn't a hard drive issue. Also, it has been fine since. Anyone else experienced some glitchy isolated incidents?