I suspect this is an ATI driver issue, but I've never seen it before.
Mint 14 with Mate WM, using the ATI propriatairy drivers, opera is visually corrupted constantly.
No other symptoms in any other program, 2d or 3d.
I have googled off and on and found one mention of it, and the solutions didn't work.
Anything else short of giving up the ATI drivers?
See attached screenshot.