Audio problem: Near the end of the film when the shark is in the control room he eats a man underwater. The man is heard to scream and cry out, and you can hear him taking breaths in between screams despite being underwater with no breathing equipment.
Audio problem: When Norman is talking to his "Mother" on the phone, the camera (in Mary's point-of-view) comes in the room and Norman says, "How could you think such a thing. I would never do such a thing," but you can see Norman's reflection in the big mirror hanging in the lounge room and you can see his mouth isn't moving. (01:33:00)
Audio problem: In the morning, Tad is watching TV and eating his breakfast. He is watching an episode of Scooby-Doo, however it is clear that the audio does not match up with the episode, and is blatantly out of sync with what is shown on the screen. (00:08:15)