The scene featuring David Spade was filmed in Toronto's first specialty video store Revue Video. Since the store specializes in films (Foreign Language and Classics) other than the ones feature in the scene, the whole look of the store had to be changed.
Paul's dorm is called Hunt's Hall. Audiences, especially older, might take this as an allusion to actor Huntz Hall, who was born in New York City (the setting of this film). Huntz played Horace DeBussy "Sach" Jones, a lively buffoon in the Bowery Boys film series, which followed his time as a Dead End Kid in Dead End and in the subsequent Dead End Kids series. It would be an appropriate connotation, in that the Chris, Adam and Noah characters are all buffoons as well as dead end kids (hedonistic young males with no real future).
In the scene where Adam, Chis and Noah are walking down the street talking about how to "Resolve this Paul issue," Noah says "I mean I try to get along with everybody but that guy's got no personality." His lip movement doesn't match up with the audio at the end of the sentence.
Dora convinces her obviously over-protective mother that she is spending the night with a friend in the "all-girl's dorm." Later, she basically moves in with her professor-boyfriend for what seems like several nights without even a thought of what to tell her mother.