Poll: What's the worst mistake HD channels make?

We've discussed it again and again, the ills done by so-called HD channels against perfectly good content, whether it's passing off SD as high definition with Fox Widescreen, vomit-inducing stretching on TNT & TBS or the inexcusable cropping, zooming and pan & scanning of movies broadcast on AMC and HBO. But which one is the worst? Let your voice be heard, and if we forgot anything drop us a line in the comments.