Factual error: According to netstate.com the average monthly high in the state of Louisiana is 93.3 degrees F (34.05 degrees C) with summer months often exceeding 100 degrees F (37.77 degrees C), making it impossible for a functional multi-story wax structure to remain functional for any extended period of time, regardless of wax content.

Continuity: When Carly wipes the dust off the mirror in the wax museum, you can see a hand swipe, the next shot shows the mirror completely dusted off, then back to a hand swipe, and so on.

Continuity: When Paige is 'spiked' by Vincent, she falls onto her hands and knees and her hands are in fists. Yet after Vincent starts filming her they have changed.

Continuity: When Carly locks herself in the truck, the owner throws to the ground the box holding the fan belt and a few other things, right beside the driver's side of the truck. In the next exterior shot, there is nothing on the ground.

Continuity: When Paige walks out to Blake in his car he kisses her. When it cuts his hand is suddenly on her chin.

Audio problem: In the beginning of the film, when Trudy offers her son more cereal, her mouth doesn't move as she speaks.

Continuity: Elisha Cuthbert is a foot shorter than Jared Padalecki, so they stacked blocks under her shoes to make her appear taller (as seen in one of the extras). However, in full body shots there is nothing under her feet and she's much shorter than those shots when you can't see her feet.

Deliberate "mistake": Due to the thin tissue and blood supply to the lips, after Carly ripped the superglue from her lips she should have bled profusely, requiring steady pressure for a minimum of five minutes. However, that would have obviously slowed the tension of the movie too much.

Audio problem: Carly leaves the voice mail message for Paige and the whole scene with the truck gets on the voice mail. When Blake checks his phone after the music stops, the message isn't the same as earlier.

Continuity: When Carly, Nick and Bo are walking up against Bo's house, Carly's hands change from being crossed behind her back to hanging down between the shots.

Continuity: When Carly is in the wax bedroom near the end of the film, she is fending off Vincent with a bat. She lays the bat on the wax bed while talking, and it leaves an imprint in the wax. When she runs on the bed to the other side, the imprint is gone.

Continuity: In the scene where Carly is taken into the basement under the gas station, her kidnapper turns the radio on when they enter the room and he locks the door when he leaves, leaving the radio on. When Nick runs inside the gas station, the door is unlocked and the radio is off.

Continuity: When the weird man gives Carly and Wade a ride, he steps out of the car to let them out. However, he does this twice in different shots.