Corrected entry: When Homer says that he is going to get Bart a birthday present, he runs to the car and drives away. Not only is it impossible for him to run out to the car, get inside, start the engine and drive away in the time he did, but he presumably used the back door (as we did not see him use The Front door). Why didn't he use The Front door? It would have been much quicker.
Corrected entry: When the woman in Krusty's studio says that the wolf gets spooked by loud noises, Krusty mentions "loud" as the day's secret word. There are video cameras in sight, indicating that it was being aired on TV. The only problem is, it's not going to be the secret word any longer if it is revealed like that.
Corrected entry: Before the Simpsons are in their house talking about the Itchy and Scratchy Movie, there's a line of people waiting to see it that extends past their house and down numerous streets. When it shows one of the kids talking, the window behind them shows that all the people have vanished.
Corrected entry: When Aunt Gladys Bouvier dies, she leaves her pet iguana to her sister, Jacqueline Bouvier (Marge's Mom.) If she never married as she claims, Jacqueline's maiden name would have been Bouvier, not her married name. This would also mean that Patty, Selma and Marge would not be Bouviers either.
Corrected entry: In "Clown Without Pity", where the Krusty doll acts as Homer's servant, Homer says at one point "Yeah, dogs like to bury old junk", in which the Krusty doll says "Yeah, you stupid idiot.." The 'you stupid idiot' part is said with his mouth closed. (00:07:15)
Corrected entry: In one scene, when Bart is a child, he and Homer are watching Krusty and Sideshow Mel. However Sideshow Mel appeared only after Sideshow Bob was arrested, as his replacement. Krusty even mentions this in another episode, saying something like "The guy I got to replace you doesn't hold a candle to you Bob".
Corrected entry: On the series 4 DVD box set there is a message from Matt Groening. In the message he is talking about some of the episodes, and refers to "Ralph Wiggum's immortal 'Choo-Choo-Choose Me' valentine to Lisa." In actually, it was a valentine from Lisa to Ralph, and the card read "I Choo-Choo-Choose You."
Corrected entry: At the beginning of the episode, where it has Troy Mclure on a TV programme, Troy Mclure has a microphone. Notice that as he walks down the orange stairs, there is a wire following him, which is attached to the microphone. When Troy reaches the bottom of the stairs the wire has now disappeared from the stairs. (00:01:50)