Factual error: When the cop (Bobby) asks the woman if it's her van, she says she found it when she got home. In actuality, the police would get suspicious because she didn't report it. Someone comes home and sees someone else's vehicle parked in their driveway and neither her or the man call to report it (at the very least to have it towed)? (00:44:15)
Revealing mistake: When Fool is in the bathroom, the father pokes his head through the door (after firing a rifle at it), and turns to Fool who smashes the toilet tank lid on his head. The blood mark is on the father's right temple, but he was clearly hit in the middle. (00:44:40)
Continuity mistake: In the opening scene when Ruby is laying the tarot cards down for Fool, the cards that she lays down changes position in the following shots, most noticeably the Devil card. (00:45:00)
Continuity mistake: When the Man blasts the two doors away with his gun, the two outer doors get blasted off, however a large piece of plywood still remains in this entrance. In the next shot, when the Man yells "Gonna kill you!" the whole entrance is clear and the remaining wood is now gone. (00:45:10)
Continuity mistake: When Fool hides behind the cat-flap style vent, at the end of the hallway, The Man comes down with his gun. The items behind the vent change position (eg. the cloths, bones, etc.) (00:45:45)
Continuity mistake: When Fool tips Alice's dolls onto her bed, in the next shot the pile is positioned differently. (00:48:25)
Continuity mistake: When Alice is pushed into the blood to mop it up, the bucket of water sits beside the dining room rug. In the next shot it is suddenly in the middle of the blood with Alice. (00:49:30)
Revealing mistake: When Alice is pushed to the floor, to mop up the blood, her kneepads are visible. (00:49:30)
Continuity mistake: The amount of blood on the side of the Man's face changes alot through the movie, especially in the cellar scenes. (00:50:20)
Revealing mistake: When Alice is forced to sit inside the bathtub of scalding water, as the Woman pushes her inside it, it is quite obvious that the steam rising from the tub is actually coming out from under the tub. (00:50:50)
Continuity mistake: When Roach writes 'Alice' in the white wall, in the first shot he writes it neatly. In the next shot the writing is very messy, then neat again in the next shot. (00:54:10)
Continuity mistake: When the Man tells Prince to shut the fuck up, the amount of blood on his chin changes between shots. (00:55:50)
Audio problem: As Fool is attacked by Prince in the wall he cries out "Alice, Get Back!" yet his mouth is shut. (00:59:20)
Audio problem: When Prince falls out of the wall, dead, the Woman cries out "You Killed Prince!" yet her mouth only says "Prince!" (01:01:10)
Continuity mistake: When Grandpa Booker looks at the coins, the pile on the table in front of him changes position between shots. (01:03:30)
Factual error: When Fool calls the police from a coin phone, he puts the coin into the phone, then calls 911. Given that 911 is a free call we should hear the sound of the coin being returned immediately after it was dialed, but we don't. (01:08:45)
Revealing mistake: Fool hits the Woman with a fire poker on her shin but she screams in pain and grabs and rubs her knee. (01:11:35 - 01:15:00)
Continuity mistake: In one scene where Fool goes back into the house to get Alice, he takes a fire-poker from the fire place. As he walks through the house, you can see the poker is intact. After he strikes "Daddy" you see the poker break. In the next shot, the poker is back, unbroken. (01:11:45)