Factual error: After Mat has turned off his ringer we see him going into the menu and turning off his voice mail through an option labeled "Voice Mail / Off". The biggest problem with this is that there is no option to turn off your voice mail in an I90. The closest thing that it has is an option to turn off the ring tone that signals a new voice mail message.
Continuity mistake: At the beginning of the movie, when Ann calls Matt to her house and they are about to make out, Matt grabs Ann with both hands by her throat. The camera shows both of them in profile with their faces very close together. When the camera view changes to from behind Matt they are much farther apart.Christoph Galuschka