At the frat party where Jordan is carried unconscious up the stairs, the song that is playing is "The Macarena". However, later in the film, as Melissa is reviewing the video tape footage of the party, and that same sequence is shown again, a different song is playing.
When the main character goes to the frat party she is wearing sneakers, but when she leaves she is holding sandals.
At the end when the information about acquaintance rape scrolls across screen, "acquaintance" is misspelled.
As Melissa is walking across her friend's room to confront her, the sound you hear doesn't match the footsteps shown.