Homer vs. Patty and Selma - S6-E17
Corrected entry: When Bart takes off his face mask during his ballet performance, all of his fellow dancers have disappeared.
Springfield Connection - S6-E23
Corrected entry: In the scene where Marge is chopping celery, the knife is always in front of the celery as she chops, and never passes through the stick of celery - so no slices should be cut.
Who Shot Mr. Burns? (1) - S6-E25
Corrected entry: During this episode, Skinner mentions that he doesn't have a secretary, but in a much earlier episode called 'Bart the Genius' he has one.
Correction: Skinner said he *doesn't* have a secretary. He didn't say he has *never* had one. He obviously doesn't have one in this episode. He didn't say anything about the secretary he had in Bart the Genius.
The secretary could've quit, been fired, taken a promotion, been laid off due to budget cuts, etc.
Correction: Bart's doing a solo - the other dancers would have left the stage.