Continuity mistake: In the scene where Jill and Charlie are revealed as the killers, Jill is holding a knife to Sidney's throat and a gun in her left hand as she explains her motive. When Jill and Charlie are getting ready to stab each other, the shot changes and Charlie hands Jill the knife, even though she just had it in her hand pointing it at Sidney.
Trivia: While the film is primarily written by "Scream" and "Scream 2" writer Kevin Williamson, due to a hectic production schedule, "Scream 3" writer Ehren Kruger was brought on to do some last-minute rewrites during filming. However, Kruger chose to go uncredited, as he mainly worked on "polishing up" scenes originally written by Williamson.
Rachel: A fucking 'Facebook' killer... You're kidding me right?
Chloe: I guess now it would be Twitter, that'd make more sense.