Deliberate mistake: While Donnie is training at Front Street Gym, when Rocky repeats, "One step at a time, one punch at a time, one round at a time," the closeup of two children watching from outside the ring is a flipped shot, note the backwards Nike swoosh logo and Everlast ring rope spacer. (00:53:05)
Factual error: The year is 1952. In an exterior scene, Saoirse Ronan is seen on a street in Brooklyn. In the far background, a red "WALK/DON'T WALK" sign is flashing. This type of sign was only introduced across NY in the late 50s.
Factual error: There seem to be modern "Walk" and "Don't Walk" signs at each intersection. This film is supposed to take place in 1952. Also it is mentioned there are "Stereophonic" consoles in the motel rooms. Probably would not find those until at best the late 50s.
Continuity mistake: Near to the end Gabriel Oak leaves the farm and as he leaves his cottage he is dressed in a white shirt, cream trousers and a dark waistcoat. When Bathsheba Everdene catches up with him on the road he has completely changed his clothes and is now dressed predominantly in blue.
Continuity mistake: The getaway car changes from a Peugeot Partner (1996-2003) to a Citroen C3 Picasso (2013-2017). (01:35:30 - 01:36:05)
Continuity mistake: The full table of scores for the contestants is visible before the Carl Hayden High School students actually did the task (they were the last group to do it). (01:25:20)
Revealing mistake: When the twins are born neither baby has an umbilical cord attached to them. Also the baby girl has a bellybutton.
Factual error: Herman Melville interviews whaling survivor Thomas Nickerson in Feb. 1850. Nickerson tells him "I heard a man from Pennsylvania drilled a hole in the ground recently and found oil." Oil was discovered in Titusville PA in 1859.
Revealing mistake: Right at the beginning of the film "rain" is falling on the car the camera shows before it moves to focus into the tunnel. However, look at the cars behind it, they aren't wet at all and it's visibly sunny. It's water being poured onto the car directly in front of the camera.
Factual error: When he is in the restaurant and looking at the security feed, he does a who command when it should be "whois". Also the IP is incorrect - the 3rd octet is 265, despite the maximum possible value being 255.
Factual error: Near the end, Jackie Chan's vastly-outnumbered forces resort to throwing stones to somehow utterly destroy a phalanx of Roman legionnaires in close-quarter combat. This scene flies in the face of what we know about Roman military superiority in the time of Tiberius. The Roman Army was the best-trained, best-organized, best-equipped military force of the Ancient World, specializing in tireless close-quarter combat and impenetrable defense. To suggest that Jackie Chan's frantic and disorganized group of fighters (throwing stones by hand) might overcome Roman legionnaires is like suggesting that cave men might overcome the modern U.S. Marine Corps.
Visible crew/equipment: When Bryson and Katz are getting onto the Greyhound bus, a guy in a fluorescent jacket can be seen holding traffic up in the distance whilst the scene is filmed.
Factual error: Ann plays an organ in a church with no electricity. And no, there was no manual bellows to make it work; the movie makers simply didn't know the difference between the operation of an organ versus that of a piano.
Other mistake: Ma and Jack bake a cake, but there is no way of doing this as they have no oven - only a work top hob and a grill.
Continuity mistake: When Joseph Gorden-Levitt is performing his street act in Paris, somebody drops a jaw-breaker candy into his hat instead of money. He removes the jaw-breaker, performs some sleight-of-hand with it for the entertainment of the crowd, then deftly drop-kicks the candy into his mouth and bites down on it hard on the right side. It breaks his tooth and he immediately goes to the dentist; but he is clutching the left side of his face, instead of the right side.
Continuity mistake: When Nicolas Cage is standing on a roof top patio with the oil industry financier, an orange disappears. The oil guy is peeling an orange as he talks to NC and then when Cage leaves the scene the orange is gone without it ever being eaten or discarded. (01:00:00 - 01:05:00)
Continuity mistake: Right at the beginning of the movie, the Sergeant pulls his jeep over and headbutts a prisoner who is carrying a Danish flag, seizing it. In the following shot he has his arms open and shoves away another prisoner, no flag in his hands. Next shot, he's standing by the bleeding prisoner, folded flag in hand. (00:02:25)
Character mistake: The protagonist is reading the review of his book "Bitter Tulips." The influential literary critic publication apparently has zero proofreading, since the article says that the novel "can be described as AN failed experiment." (00:45:00)
Factual error: Throughout the film, the helmet plates worn by the London Policemen are the 1930's pattern with the George V cypher in the centre. In 1912/13 they would have repeated the officer's collar number in the centre. The helmets themselves are also British military pattern blue cloth helmets with Police fittings added, rather than the correct Police pattern ones.
Continuity mistake: The first time we see Roland on his own at the bar, he's talking with the bartender, Michel. When he asks Roland in French where his wife is, Niels Arestrup's arm changes position instantaneously in an edit mid-sentence, and does the same a couple more times after. (00:11:30)