Hey, I noticed what appears to be a thin (hairline) scratch on my iBook's screen, but I'm not sure whether it's simply a scratch I'll be able to deal with or a crack that's going to end up damaging the rest of the screen. When I hold the computer up against the light when it's off, the scratch appears to be a few inches long--yet when I have the computer on only 1/4 it shows up. It distorts the colors behind it. It's not really noticeable when against dark colors, but when against white, it has kind of a purple'ish, blue tint. What do you think? I bought the computer used, so if it's something that's going to do any harm or worsen over time, I'm probably going to have it replaced (there's a 30 day warranty).