Continuity mistake: When Eddie falls through the floorboards, you can see his arm looks perfectly fine and is unbroken in a few quick shots. After the movie cuts back to him a few moments later, suddenly his arm is badly broken. (01:20:30 - 01:23:25)
Continuity mistake: When Andy is grappling with the "buzz-cut" Chucky and trying to rip his clothes off, at one point the camera cuts from a medium shot to a closeup as he rips Chucky's overalls down. In the medium shot, Chucky's left arm is reaching for Andy's wrist, but isn't holding it. But in the closeup, suddenly Chucky is grasping Andy's wrist.
Continuity mistake: On the third and fourth day, Carter's roommate shows up earlier than the first 2 days. And Tree's suspect tips notebook every day don't reset and the line and erases are the same.
Continuity mistake: Lucas received his mid-term grades in the mail BEFORE Mr. Butler actually entered his grade on the computer. Lucas got the mail and took his unopened grade report to his bedroom then the camera shifts to Mr. Butler contemplating what grade to fill in for Lucas. Mr. Butler made the entry (grade not shown) and closed his laptop. The camera returns to Lucas, who opens his mid-term grade report and sees the "F" from Mr. Butler. (00:51:21)
Continuity mistake: At the start Edgar smashes his car up and kicks his window out and jumps out leaving a bit of glass in the window frame. However after the camera changes, the 2 bits of glass have disappeared. (00:01:05)
Continuity mistake: Selene normally wears high heel boots. They briefly turn into flats during her caged fight with Varga, right before he betrays her. (00:26:40)
Continuity mistake: When Janice is on the stairlift on the second night, just as the stairlift stops, we see her looking over the arm of the seat. Camera changes and and she is no longer looking over the arm. (00:49:00)
Continuity mistake: Clare's pants split at her knee because she falls off her bike and she gets injured. When she returns home later to see her father, the pants have been fixed and there is no hole.
Continuity mistake: At the beginning of the movie, Cass is blackmailing Mira about the true nature of her little trip. She calls Liam up; during the scene, she is holding the hanger in a different way between shots (left hand on the hook, or under it). (00:04:00)
Continuity mistake: When the vault is about to be opened, the drilling equipment is attached to the door, but the view from the camera watching the door being opened shows no equipment.
Continuity mistake: After Hutch is buried, Dominic leaves to catch up to the other two, limping with his right knee held rigid. An aerial shot is then taken showing Dom limping on his left leg instead.
Continuity mistake: When Jen wakes up after she is raped by Stan, her earphones are shown positioned on top of her iPod beside her. A couple of shots later, the earphones and iPod are positioned separately beside each other. (00:23:50)
Continuity mistake: There's a vase of yellow flowers to the right of the helium "Happy Birthday" balloon (and screen). When Ashley gets up to answer the door, she walks past the balloon and the vase of flowers should be visible but is not. (00:01:40 - 00:02:28)
Continuity mistake: When Nicholas Cage and his kid are enjoying a flashback, the ice lolly keeps shrinking and growing throughout the conversation. (01:14:00 - 01:15:00)