Continuity mistake: When Lotte is tied down to the altar and is talking to Jimmy, the cut on her face alters constantly from the left cheek and right cheek throughout the conversation.
Continuity mistake: The position of the rifle David [Val Kilmer] dropped was at a different angle after he backed up and then walked toward it. (00:05:38)
Continuity mistake: During the fight, the extent to which the fire (starts on top of the mound) spreads toward the ground varies. Also, the fire burns downward through snow, but does not melt the surrounding snow along the sides and bottom of the mound. (01:15:35)
Visible crew/equipment: As the camera circles Nelson exiting the SUV, you can see crew members in the RS mirror as he shuts the door. (00:26:40)
Continuity mistake: When Frida is in her room and throws the stuffed animal near the window, she sees a zombie in the pouring rain across the street. However when her boyfriend startles her in the window, he is dry and the rain and wind instantly stopped.
Revealing mistake: In the evil woman's dramatic scene after she kills the children, her knife flops around like it is made of rubber, but sounds solid when she throws it in the sink. (01:22:35)
Plot hole: Every ghost that we see in the house looks the way they did when they died, for example the girl from the film's intro is seen without skin on her face, which happened to her before she died. However, in the final scene when we see Simon's ghost joining them, he looks completely normal, when he should have had a throat slit wound and the carved markings on his skin. (01:31:20)
Factual error: The credits list several of the characters as "Arab." But the film is set in Afghanistan and the Afghans are not Arabs.