Auto-save icons in games, especially in games where you can't turn off auto-save (nearly all new ones these days). They completely fuck up my capturing of footage for use in music videos. I either have to leave them in like an obnoxious DivX logo that comes and goes, or I have to crop them out, screwing up the orientation of my footage and making processing it that much harder as I have to decide between using a bizarre aspect ratio or cropping out MORE scenery to get it to a normal one.
What I'm saying is, fuck you, developers. Stop making my semi-illegal hobby more difficult!