When Troy is talking to Veronica about his name being on a message board. The same girl with a brown and red top walks behind him in two consecutive shots.
Wallace (Percy Daggs III) and Veronica (Kristen Bell) are talking about SAT scores, but they are using the old scoring system, based on 1600, as opposed to the current 2400-point system which was introduced in 2005.
When Keith Mars is looking for Cliff McCormack in the hotel he says he is on the 12:th floor. From the pan upward before he goes in you can see it has at most six floors.