I just realized that my iBook has a dead pixel. It's right in the middle of my buddy list in Adium. It only shows up on the blue background, too, so it's possible that it's just a stuck pixel. I hope. I had to change my colors to an orange instead so I don't see the damn thing since it's annoying, but at least it's off to the side.

Note: Growl just popped up and it showed up in the middle of the pop-up...which is blue. Hopefully just a stuck pixel. I won't be pissed if it's not, though. That kind of shit happens.