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: When Lisa asks what was Bart's first word Marge imagines Bart walking into Homer and Marge's room and says aye carumba. But its in the current house but Bart lived in a different house when he was younger so it is most likely he said his first word in that house.
Correction: (It is the old house. Behind Bart is a green wall, which can't be the upstairs of the new house because that has a pink wall.).
Corrected entry: Even though Grandpa Simpson is younger in this episode, a picture of his older self is hanging in the Simpsons' home. Creepy.
Correction: That's a picture of HIS father. In several episodes of The Simpsons it is established that Homer will look just like Abe as he gets older, and so on down the generations.
Correction: It is Sideshow Bob who Bart and Homer are watching. You can tell by his voice (when he grunts when he drops the weights in Krusty's show), not necessarily the fact that he has green hair, just like Sideshow Mel in the flashback. Apart from that Sideshow Bob's hair is normally in a palm tree shape, and Sideshow Mel's hair is shaped a bit like Marge's.
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