Continuity mistake: Liam loads a stretcher in a van. The interior is a Chevrolet. The outside view is a Ford with a bubble window and drives away. Then the next scene shows the gas gauge on a Chevy dashboard. But the worst is at the gas station. While he was filling the van you can see the "express" tag on the door, which is Chevrolet with no bubble window. In the next frame you see the side of the van. Definitely a Ford and the bubble window is back.
Factual error: The license plate on the sheriff's car when he arrives at the factory is 5Q49926. In California - where the film seems to take place - that is a "Commercial" license plate issued to trucks and commercial vehicles, but law enforcement are issued "Exempt" plates which are 7 numbers.
Plot hole: At the beginning there is an audio recording of Thomas talking to the police. He explicitly says 'They killed her! They Killed my sister, my mom!' or something to that effect and that Thomas was arrested for the rape and murder of his sister and he killed himself in custody. At the end, his sister is killed and the little epilogue says that the sister's body was found in her brother's arms and when their mother found out about the 'death of her children' she killed herself. That doesn't make sense logically. Thomas was alive when his mother was dead, according to the clip at the beginning.
Visible crew/equipment: In the scene where Jenny's former boyfriend shows her the broken cupboard-door a crew member is reflected in the window over her right shoulder.
Audio problem: DVD version. In the scene where Lisbeth is about to be buried alive, she gets shot three times by her father as she tries to run away. The sound effect of the gunfire includes the tinkling of a spent cartridge hitting the ground (clearly heard in the rear right). However, the father's gun is seen to be a revolver, which does not eject spent casings when fired - the spent casings stay in the cylinder. (01:50:30)
Factual error: The scene where Princess and Steven are in Chrome Skull's truck, they are trying to dial 911. They are denied access because the phone is password protected. This would never happen. Even though there is a lock on the phone, it would be automatically deactivated for 911 calls. When you lock your cell phone to protect it from unwanted usage, the phone will deny all usage EXCEPT 911 calls.
Continuity mistake: Approximately 10 minutes into the movie the main character is going to burglarize a house and there is a guard dog on a chain in the yard that bites him, through a black mask, on his left cheek. After he is in the upstairs bedroom trying to open a safe, you can see blood around the hole near his left eye, but when he pulls off the mask, there is no longer blood on his left cheek, or any signs of a puncture wound.
Factual error: When Esposito revisits the murder scene, he asks Morales whether he would prefer the culprit to receive the death penalty. Morales answers that he would not, claiming that to doze off and fall asleep (hinting at execution by lethal injection) would be too good for the man who raped and brutally murdered his wife. Execution by injection has never been practiced in Argentina - where the last execution was carried out in 1916, by shooting - and was legally enacted only in 1977 and practiced the first time in 1982 (in both cases by the state of Texas). Thus, it seems anachronistic that anyone would equate the method with capital punishment in 1974, when the scene is set. (00:24:00)
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.
Character mistake: At the hospital, the inspector manages to get from the nurse the file of the patient with the liver condition. Forgetting the fact that the Turin, Italy hospital is using English for its documents (it's simply a cinematic convention), the problem is that the letterhead of this document says "Department of Chronic Deseases", misspelling the word.
Continuity mistake: When she gets the pizza from the guy at the door, it is in a white box. When she goes in and sets it on the counter, it is in a brown pizza box. Then later, when she is running away covered in blood, she grabs the knife on top of the pizza box, and it is white again.
Revealing mistake: When Steven Seagal makes his triumphant entrance in the credits, his sword misses the first zombie he supposedly hacks (right after "Written by"), by a mile. (00:03:20)
Revealing mistake: After the 4 have been tied up and babyface has killed their captors, he grabs Alexa by the neck. There is a shot of him from behind and you can see the make up covering the back of his head/neck coming up above his collar.
Continuity mistake: Sophie Marceau's Jeanne meets the Hachette executive Robert (Didier Flamand). She enters the room with handbag and jacket in one hand. She then follows him into the other half of the room. Now she has her clothes in her right hand and her bag is in her left. Not just that; the man had the folder in his left hand in the first shot, but in the new one it's in his right. (00:04:25)
Visible crew/equipment: When Chun-Li and her family arrive at their new home at Hong Kong, as the old servant opens the door, the reflection of the boom mic is visible on the black door. (00:01:55)
Continuity mistake: When Susan accidentally surprises Dane, Lucas and Julie while they are armoured up and asleep in the basement, the helmets worn by Lucas and Julie disappear between shots. (00:36:47)
Continuity mistake: When Max is going to stab Naoko at the end of the movie, he grabs her by the hair, but in the next shot he's grabbing her by the chin. (01:18:30)
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)