Watch the other Kids in the "I'm A Cat" skit. They're not even trying to mimic playing the music.
The clothing that Scott takes off as the Editor has been dropped in a different place when camera angles switch.
Kevin: Now have you read the last chapter yet?
Scott: God No!
Kevin: God, neither have I!
Scott: Ha, he never ends a book well anyway!
Both: Cut the last chapter!
The "I'm A Cat" sketch was supposed to be for Kevin, but Mark took it instead.
Yes, that is Bruce singing, but he isn't playing guitar.
For some reason, the "My Routine" sketch was cut from syndication versions.
Paul Bellini is one of the students in the class, in the "Schoolroom" sketch. As the class is leaving, Dave is giving the homework, and tells them to read the next 3 Chapters. After the class gives an unhappy groan, he yells "I could make it 4, Mr. Bellini!" A cheap shot by Dave to try to get him to laugh.
Kevin: I think it was the overture from Joesph...
Kevin gets the name wrong, but the reference is to the musical Joseph & The Amazing Technicolor Dreamcoat.