Factual error: At the start of the movie it said "NEW YORK CITY 2000", then went to a panoramic view of New York City minus the Twin Towers. Even though they stated the year was 2000 and they didn't go down until 2001.
Other mistake: In the scene where Jensen is attempting to decrypt the password on the hard drive with the algorithm, he uses the command "traceroute d-hea" which is commonly used to test network connectivity, not decrypt passwords.Then follows it with the command "dir" to reveal HTML code instead of directory structures.
Continuity mistake: During the fight at the End of the Line Bar, Gem walks and stand next to Castor. Later she move to the left and sits on a couch for the rest of the fight. However, at the very beginning, right after Quorra jumps and protect Sam, there's a brief cut where we can already see her sitting there, too early.
Continuity mistake: After the children are transported to Narnia, Edmund's hair is significantly shorter than it was while they were in England.
Factual error: The construction of Hadrian's Wall as shown at the end of the film is not historically accurate. A wooden wall was constructed first with a deep ditch on either side. One of the ditches should be visible as the characters approach the wall but it is not. The stone wall shown being constructed was not added until later and then it was constructed in sections. It did not become a continuous stone wall until some years later. In addition, the stone wall shown is not wide enough. Hadrian's Wall is around 2 meters wide at the top and even today you can comfortably walk on top of it.
Character mistake: Throughout the film, the characters refers to the seigneurie as Beaufort or Beaupré, which are actually two different places.
Continuity mistake: During the last fight with Darkseid, there's changes to what the farm looks like. At one point, instead of the windmill there's a building, which we never saw when Clark drove past the spot. And the overturned truck is missing in a several of scenes even though it should be visible.
Factual error: When they are watching the prince's wedding on TV, you can see the TV-channel's logo in the corner of the screen. The channel NRK didn't start using this logo until 1996, so the program is definitely a rerun, and not the original airing from 1968 which is when this film is set.
Continuity mistake: In the final battle scene after the Band reaches the canyons and are on a cliff overlooking the Guardians, you can obviously see that Twilight doesn't have his lute. After focusing on Soren struggling to remove the pot of tar, we see Twilight flying with Digger and Gylfie, but with his lute. Impossible to be so fast. (01:11:55)
Continuity mistake: When Ellie & Fiona are breaking into the garage to steal the gas tanker truck, Fiona's hands are by her side. The camera angle changes, and her right hand is up, holding her rifle strap.
Continuity mistake: During the last scene, the strands of hair that Edgar has running down his face/right cheek are over the top of his head during some shots. Edgar is holding a book between both hands, so not moving the strands himself. (01:16:19 - 01:16:55)
Continuity mistake: In the beginning, when Billy is talking to the bum (who later turns out to be Tawny), the bum has a glove on his right hand. When he reaches his right hand out to Billy and Billy gives him a subway token, there is no glove. It's back in the next shot.
Factual error: Sergeant-Major Saunders is wearing sergeant's stripes. Corporals Drake and Levin are wearing no rank insignia at all.
Factual error: If there was that much of a famine in the pack, the Omega wolves would surely have already died of hunger.
Factual error: After warping back from Iscandar, Kodai looks out of the window. Yuki Mori points him where Earth is. A moment later, he responds to the hailing signal saying that they are now 420,000 kilometres from Earth. Considering that the distance between Earth and the Moon is about 385,000km, Earth is looking unreasonably minuscule from their window. (01:52:50)