Every new xkcd gets posted and voted up here... even the bad ones. Maybe s/he doesn't like the hero worship and voted down the comments because there's no way to vote down the post. Kinda cheap, but there you go.
Actually I haven't seen one on the front page in a while, but maybe I haven't been paying attention.
Also, I have a friend who is a dyslexic physicist, and he thinks the Large Hadron Collider is kinda gay.