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.