Corrected entry: In the scene where Bender escapes from the closet, he is shown crawling above a drop-ceiling, eventually falling through. Bender shouldn't have been able to crawl as far as he did because a drop-ceiling would never support his weight.
Corrected entry: In the scene where John, Brian and Claire are talking about virgins, the last shot of Brian you can hear dogs barking in the background.
Corrected entry: At the beginning of the movie, Brian reads the beginning of his essay/letter to Vernon. It reads like this: Dear Mr. Vernon, we accept the fact that we had to sacrifice a whole Saturday in detention for whatever it was we did wrong. But we think you're crazy to make us write an essay telling you who we think we are. What do you care? You see us as you want to see us. In the simplest terms, in the most convenient definitions. But what we found out is that each one of us is a brain. The question, "What do you care?", disappears at the end of the movie when he reads it again, yet it's supposed to be the same essay he writes at the end of day.
Corrected entry: Why is there a piece of wood covering the front of the table that Molly and Emilio were sitting at but there aren't pieces covering the fronts of the tables that the other kids are sitting at? I know that Judd Nelson hides underneath the table later on in the movie, but still, it looks like a piece of wood was just attached to the front of the table at the last minute or something---it doesn't look natural.