I have the Circuit City exclusive version of the Superman Returns two-disc set with the bonus disc, "The Science of Superman." On this disc, as the guy from UC Irvine is explaining the drawback of Superman catching Lois Lane as she drops from the roof of the Daily Planet (Superman The Movie), it pixellates in that spot every time the disc is played straight through from the beginning. If you fast-forward through to it, it doesn't happen. If you reverse it after watching it pixellate, it then plays fine. There are no visible physical defects on the disc. Is this disc "over-compressed" in this one spot?