I took my 2011 MBP in to the Apple Store last week. They replaced the logic board and I picked it up on Monday. Today is Thursday, just 3 days later, and I just got a video-related crash. The system totally froze and I couldn't do anything (besides move the mouse pointer). I attached a photo of the screen. After doing a hard reboot, the system is working now, but of course we know the problems will get worse and more frequent. Apple is garbage!