MBP Display going haywire

Hi, I have a MBP 17", 10.6.8.  The display is going crazy, lots of sections of various applications and windows all jumping around the screen. (photo attached) Happened only 3 times.  Think it may be a graphic card problem, but want more clarification before making appt at Genius Bar.
Any other ideas?
Cheers, Chris.

Anyone?

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