Continuity mistake: Gina arrives looking for first aid supplies. She has bruises on her arm. However the next day all the bruises have gone. (00:11:30)
Factual error: A few scenes in the movie show Roman cavalrymen using stirrups, which were not used by the Romans until several centuries later.
Other mistake: When the children arrive in Blackpool, Emma tells Jake that loop entrances can be anywhere and that "the one in London is in a subway tunnel", but on the map of all the loops they were viewing previously inside the boat, there was no marking of a loop in London.
Continuity mistake: At the beginning of the movie, there is a scene where Rebecca's phone is ringing, and it wakes her up. She grabs the cell off the night stand. She has red nail polish on. When she puts the phone back down on the night stand, her nails are natural, not polished.
Audio problem: Abby is yelling at the ghosts that she doesn't like one, and then "I don't like you either" to another one. The ADR is so off that almost no words match up with her mouth movement.
Revealing mistake: As Joe is gesturing, the wrinkles of the gloves worn to make his hands bigger are noticeable.
Continuity mistake: After visiting the funeral parlor, Lee Chandler and his nephew Patrick walk back to the car. Lee puts on his cap with the brand emblem facing right. In the following shots, this brand emblem keeps flipping from one side to the other. (01:09:00)
Continuity mistake: After the seal runs away from Vera, the area where Vera is standing in the ice begins to crack. When Vera's phone starts ringing, her left foot is positioned around a foot away from the crack. Vera never changes her position, but when the shot is on her feet, her left foot has suddenly moved much closer to the crack. (00:22:05)
Factual error: When Jake Gyllenhaal confronts one of the suspects in the shed and wakes up (several hours later) after being knocked out cold, he moves the dead guy's arm. Normally, bodies stiffen up after being dead for several hours, but when Tony (Jake) moves the other guy's arm, it is not stiff at all.
Revealing mistake: When they (Finch and Frank) are on the boat to Ecuador, in the first shot you can see on the waves that the boat had sailed in what seems like a circle. (01:16:30)
Plot hole: The system providing oxygen can only be accessed by someone slim. Therefore John Goodman built the bunker with him unable to access the key facility that provides oxygen in his bunker. Yet he must have been able to go and get Britney when she went to that area?
Suggested correction: It's not a plot hole because he said in the film, the normal hatch to the air filtration was blocked by something that fell on top so they couldn't get through that way.
Other mistake: When Helen Mirren and Will Smith are standing on the subway platform and the scene cuts away to view them from the other side, we see them through the windows of a passing train. Dame Helen suddenly gets out of character and hastily answers her cell phone. She was playing a "spirit" on behalf of Will - not someone who'd have a phone. (01:04:00)
Continuity mistake: A group of people are in the copying room taking turns taking pictures of their butts on the copier. When one of them sits on the glass part of the copier, the glass part breaks. When he gets up, it's not broken.
Continuity mistake: When Laina has to take off her clothes to change after she failed, there are no straps, meaning no bra. When she and Blake are changing by the pool, she has a bra on. She never had time to change/find one.
Other mistake: During the climax, when Junior reactivates the baby manufacturing machine, the first baby to emerge from the machine is naked. The machine's hands diaper this baby. However, when the other babies emerge from the machine they're already wearing diapers. (01:15:45 - 01:16:25)
Factual error: The main character is being wooed by Lockheed - an aircraft company, whose representative then gives him gifts for his kids - one of which is a desk model of an aircraft, however it is of an aircraft produced by one of Lockheed's competitors - Grumman, which would be akin to a GM rep giving a toy Ford Mustang as a gift. Both companies continue to remain competitors as Lockheed-Martin and Northrop-Grumman since the government vetoed a proposed merger back in 1998, and at no time have the two companies collaborated on a major project.
Factual error: The present day "Grimsby" train station shows electric wires and trains. The real Grimsby only has diesel ones.
Other mistake: When "Santa" (Billy Bob Thornton) is in the bar with his mother, the bartender tells him that "smoking is not allowed in here." In the next scene, "Santa" is shown tapping his cigarette on an ashtray. If no smoking, why is there an ashtray?
Continuity mistake: The wounds that Juda got on his face from the fall from the horse at the beginning of the film, disappear the very same day.