Continuity mistake: Dan tells Crystal that his shoe size is size 11. Later in the season, during episode 16, "Mall Story", Dan tells a shoe salesman he takes a size 13. Dan's an older guy and his foot size would not grow during the short gap between the episodes - the first took place during Fall and the second took place during Spring.
Continuity mistake: Over the course of the entire show, the entrance into DJ's bedroom changes position. In the earlier seasons, the entry was on the right-hand side of the screen and the bathroom door was to the left. In later episodes, the characters entered the bedroom from the left-hand side. Everything else in the room remains the same.raywest