I have been noticing this from my macbook recently, for the past few months, and of course when I brought it into the Apple store my MBP was acting completely fine. But the graphics on my screen jumble, or freak out, and glitch. I can't decide if there is something wrong with my card or what? but I have attached some of the screen shots I took while the screen was messing up to sort of document what is happening. Most of the problems are random, but it occurs every time I open Microsoft word or excel. Has anyone else experienced this or knows of a solution? Any help would be greatly appreciated!