Audio problem: When Chris and Cynthia are hiding in the little shed from the zombies, there was a scene where a zombie grabs Cynthia and pulls her outside the shed. As she is being pulled out she reaches out to Chris and screams "Brad, Brad" a few times. Brad was her boyfriend whom they killed a few scenes before. But she was with Chris and not Brad so she should have called for Chris instead of Brad.
Other mistake: There is a scene at the beginning of the movie where the two main male leads are walking near a frat house having a party. The shot with the error starts on a frat banner and then pans down and across to the female lead (Jill Whitlow) and stops with her in the center of the screen. At this point, her legs are transparent.