Anyone have this issue? I applied the 10.8.3 update a few days ago, Now i got random reboot, really bad, rebooted twice today while i am in the middle of editing, I am bumping my head against the wall. By the way, I have a mid 2010 macbook pro. It used to give me black screen when I had lion, changed to mountain lion and have no issues, until this update! Anybody in the same situation?