In the scene where the American Idol judges comment on the competitor's performance, at first Randy and Ellen can be seen sitting next to Kara. However, when Kara comments on the performance, Simon and Moe can be seen sitting next to Kara.
After Moe agrees to judge the beard contest, Homer, Barney, Lenny, Carl and the man with the big beard thank him in lady voices. But when Moe scares them off with the light switch, the bearded man has disappeared and only the other guys are seen running off.
Homer says that he wanted to name Bart "Barf", but Marge was afraid that other kids would make fun of him. However, the flashback in "I Married Marge" shows that Homer was more reluctant to use Marge's name ideas in fear of the same thing.