Other mistake: During the opening, when Danny rides his bike past the boatyard, the image has been reversed. The registration numbers on the boats appear as mirror images.
Factual error: A 1955 Chevrolet is parked in front of Lily Tomlin's 1955 Dodge. Its license plate reads "528 GPR." California license plates did not begin to use combinations of three numbers followed by three letters until 1969. The "528 GPR" plate would have been issued circa 1975 and originally had yellow letters on a blue background. For the movie, the blue background was repainted black so the colors were appropriate for 1955. However, an actual 1955 plate would have three letters followed by three numbers.
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)
Factual error: Michael's wife meets with Longo in prison, and she has an iPhone. The trial was in 2003, 4 years before the introduction of the iPhone in 2007.
Revealing mistake: When Rachel has a red turban on and is supposed to be bald, you can see her hair under the turban.
Factual error: At the beginning of the movie, Jason Sudeikis pops out of a door wearing a Jurassic 5 T-shirt. Problem is, the artwork on it is from the cover of Feedback, their 2006 album. The scene, as the introductory caption says, is supposed to happen in 2002. (00:00:55)
Continuity mistake: The blood on the good guy's white shirt continuously changes through the last chase. (01:22:00 - 01:26:00)
Revealing mistake: In one of the opening scenes the platoon of the captain is gunned down by a MG42. You can see the crimped fronts of the blanks in the belt.
Continuity mistake: When Peter Pan is fighting the tribe's Pan on the trampoline and they're just about to finish Peter Pan off, the elder chief calls for the fight to stop. Peter's arms are above him in the overhead shot but are outstretched in the view from behind Peter.
Factual error: The delivery van bringing gear for the walk has a 718 area code on it. That area code did not exist until 1984.
Factual error: A band poster for the Polish blackened death metal band Behemoth is shown while Bruce drives around the town, however the poster features the band as they are in 2015 while the film is set in 1990.
Continuity mistake: In the locker room scene after Tony injures his knee, Tony walks outside the room crying and he then throws his helmet against a wall, causing the chin strap to fall off onto the floor in front of the the doors. When the coach walks in through the door, the chin strap has disappeared. When the coach and Tony hug, look just behind the coach's right arm. You can see a quick glimpse of the chin strap back on the floor where it was before.
Continuity mistake: The belt around the dude's head changes position as he's tied down on the table. (00:39:45 - 00:40:45)
Factual error: Tina's striptease dance is mentioned several times as a notable scene in the fictional 1986 movie 'Camp Bloodbath'. When that scene plays out, the song Tina dances to is Warrant's 'Cherry Pie', which wasn't released until 1990.
Continuity mistake: Depending on day or night, the size of the Christmas tree changes in height and fullness.
Other mistake: When Otto Preminger calls Trumbo from his car to announce that Trumbo's real name would be credited for Exodus, Preminger tells him to look at the front page of the New York Times. The problem is that Trumbo has already picked up the paper from his counter and is reading before Preminger even tells him which newspaper features the article.
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: Nicholas Cage sees his ghostly son through the window of a bus, and so he rushes after him. Right at the first left turn, the natural light couldn't be any more different in the two separate shots. (00:32:30)
Continuity mistake: When the big truck chases the red car and repeatedly rams into it you can hear broken glass, etc. but in the next shots the back of the car is intact, red and shiny, without a scratch on it. (01:05:00 - 01:06:00)
Character mistake: The girl scores a goal in the soccer game but it does not actually go into the goal, so everyone is celebrating a miss. (00:02:00)