Factual error: The film takes place in a private boarding school the 1950's, however one of the students is studying from a 1980's chemistry textbook.

Continuity: Before going to the theatre to watch Neil's performance, the boys are grooming themselves at the school. Todd has combed his hair backwards and styling remedies has been applied. But when the group are about to leave the theatre after the play and Neil and his father passes them at the entrance, Todd has his regular hairdo again.

Audio problem: When Chet is pummeling Knox, Chris pulls him off yelling "Stop it!", but her mouth doesn't move.

Continuity: At the very end, about 14-15 students are seen stepping to the tops of their desks. The last shot before the credits, however, shows only 10-11 students on their desktops.

Continuity: When Neil is talking to Todd about doing the play, Neil takes off his jacket. In the next shot, he's holding the jacket differently.

Audio problem: In the scene where Todd is in the principal's office with his parents and the principal, and is is being asked to sign the paper, during the shot of Todd looking at the paper, his father's voice says," I've had enough, just sign it", and it is very obvious that line was added in because it sounded like it was very distant or over a radio or something.

Audio problem: The first time all friends are in the bedroom together Charlie says "Unless you're a genius like Meeks." Meeks replies "He flatters me so I'll help him with Latin." Halfway through this sentence the shot changes to a sideway shot of meek and his mouth isn't moving.

Factual error: Keating misquotes Whitman's "Song of Myself". The word "rooftops" should have been "roofs". An English Lit teacher of his caliber would not have made this mistake. This is a deliberate mistake on the part of the filmmakers.

Continuity: Pitts jumps off Keating's desk twice, which would not have been necessary.

Other: The ripped-out section of the poetry books looks to be at least 15-20 pages, yet when the waste-basket is passed around, each boy only tosses in one or two sheets, and the floor is no longer littered with paper.

Audio problem: In the classroom when Keating says, "Armies of academics going forth measuring poetry.", it is obvious that this is dubbed over because his mouth doesn't move correctly with the words.

Continuity: When Knox is trying to talk Chris into going to the play with him, for about four shots between the two of them it changes from snowing pretty hard to not snowing at all.