I was just doing some light photoshop work when I expanded a photoshop window I noticed all this digital noise around the outside. Is this the faulty vid card manifesting itself? I had apple run a video test on the machine in the store about 2 weeks ago when I was in for an appointment because I saw something similar to this and needed my top case replaced anyway (my trackpad was malfunctioning) They said the test said the video card was fine. This occurred in photoshop CS4 on 10.5.6 on an early 2008 mbp 2.5ghz w/ 4gb ram. My actual file is open in the center of that mess, it blends in because it's a dark gray. Suggestions?