Factual error: Behmen and Felson land on the '"Coast of Styria", which was in Austria, a landlocked country.
Revealing mistake: When Tigress is hatching a plan to escape Gongmen Tower after they have been trapped, she looks out over the wall. But take a close look at the archers: they all move in perfect sync, indicating the same animation models were used for all of them.
Continuity mistake: When Talia gives Larry a pair of glasses, a strand of hair is either falling over her cheek or tucked behind her ear, depending on the angle.
Factual error: Just before it shows Ailbileen using her newly built outside bathroom, there is a overview shot of Elizabeth's house. The house has architectural (3 dimensional) shingles installed but according to Nachi.org, these shingles were not introduced to market until the 1970's.
Continuity mistake: George is in his dressing room, holding a tissue in his right hand. When the shot changes, the tissue has moved to his left hand.
Revealing mistake: While driving the Mercedes to the house of grandma, the gauges on the dashboard show speed is zero and the engine is cold.
Continuity mistake: When the trio are about to enter the maintenance tunnel under the cargo hold, there is nothing in the tunnel. Morgan tosses a single bag in to start crawling through it, but she crawls over another bag already in the tunnel. (00:57:30)
Continuity mistake: When Hal is showing his friend how the ring works and has to "recharge" it, his grip on the lantern changes between shots. (01:09:45)
Character mistake: Nicole Johnson, a criminology professor, after enumerating a number of facets of jurisprudence, states that following these tenets is, "The only way the criminal justice system can ever be perfect." As a professor, she is surely aware that, despite following the pronouncements in the referenced book, criminal justice is far from perfect.
Continuity mistake: When George Clooney is deciding whether or not his family's land holding will be sold to a corporation, he is sitting with two of his cousins. From a front view, his cousin, Hugh, opens a book. Then the shot switches to a side view, and it shows Hugh still opening the book.
Continuity mistake: When Boyle arrives in his police car at the house where McCormick is murdered, he turns off his engine and his windscreen wipers are pointing towards the sky. In the next shot you see the windscreen wipers in their normal position again.
Revealing mistake: The hero breaks through a window from a balcony into an apartment. The way it shatters and crumbles into such small pieces indicates that it is breakaway glass, not regular window glass, obviously for the safety of the actor during the stunt. (00:55:25)
Continuity mistake: After Brendan throws off Koba's guillotine he goes in an arm bar trapping Koba's right arm, however when Koba slips out Brendan is shown pinning his left arm instead.
Continuity mistake: In the restaurant scene Nathan has a glass in his right hand on the table. The next shot appears the glass on the table without his hand, and then again in Nathan's hand.
Continuity mistake: When Tasha walks into Tyrone's bedroom, Tyrone is only wearing his boxers, but in the next shot he has grey joggers on.
Other mistake: Jacob takes Cal shopping. In the shot during which Jacob says to Cal "the skin under your eyes is starting to look like Hugh Hefner's ball sack," the film is flipped and the viewer is watching a reverse (or mirror) image. This is revealed principally by the fact that the emblem on Cal's Polo shirt is on the right side of his chest as opposed to his left.
Continuity mistake: Dylan and Jamie roll under a garage door with sandwiches in their hands. They both walk up the stairs with the sandwiches. As they exit the building onto the roof, there are no sandwiches in their hands. However, they are amazingly eating those sandwiches shortly after. (00:12:00)
Continuity mistake: In the scene where the mother and boss of the company is giving a speech, in one shot the puppy she is holding is resting on her shoulder; in the next shot it is lying in her arms, and then finally in the next shot it is back to resting on her shoulder.
Continuity mistake: The overall timeline of the film is about twelve months but it is inconsistent as far as the seasons. When Blomkvist arrives at the Vanger's island, it is the dead of winter with deep snowfall. A short while later, when Blomkvist is talking to the detective on a pay phone (who asks if he is surviving the winter weather), the snow is gone and the deciduous trees have no leaves, but a few minutes later, when the scene cuts to Henrik Vanger being rushed to the hospital, it is suddenly the middle of summer, sunny and the trees are in full bloom. When Lisbeth arrives on the island, and she and Blomkvist are sitting outside at night talking, the trees close to the house are bare and a howling wind can be heard in the background, but the next day trees have leaves. Some weeks later, when Lisbeth saves Bloomkvist from Martin, it is winter again, with heavy frost on the ground and trees are bare once more. A little while after that, when Lisbeth and Blomkvist go to find Harriet, trees on the street are in full bloom. A day or two later, when Blomkvist is talking to Harriet in the park, it is apparently now early spring because the smaller deciduous trees are only just beginning to sprout new leaves while some bigger ones have none at all. At the very end, it's just before Christmas again.
Character mistake: In the scene where Ned talks to Janet after getting out of prison, she says "Jared this is what happens..." His name is Ned, not Jared. (00:08:00)