Factual error: When Corky is trying to get into his family's underground casino and is being worked by the wrestler girl and the "little person", his wallet falls out. The little guy picks it up and looks at his license. The next shot shows you the license is from Florida and this license number starts with an "L". That is incorrect because in Florida your license number always starts with the first letter of your last name. In Corky's case the letter "R".
Factual error: Vince has a chat with his daughter in 1974. The movie poster on her door is for the Yellow Submarine. Yellow Submarine came out in 1968, but the poster shown is from the 1999 re-release.
Factual error: The zip code Henry gives Beth to Augusta (04139) is not a zip code.
Factual error: In the scene when Jim goes to band camp to look for Michelle, all the flute players (including Michelle) don't know how to play flute, they aren't moving their fingers to match the speed of the music. (00:26:55)
Factual error: At the end of the movie, the son arrives from Dartmouth. But he does so in Grand Central Station. To come from New Hampshire he would have to arrive at Penn Station. (01:53:40)
Factual error: The beehive is a large part of this story for Archie wants to get it down for Ava. But bees do not make hives like that. The type of hive that they show is similar to a wasp's. (01:02:35)
Factual error: The corporal mess steward addresses the sergeants as 'sir'. British sergeants are never addressed as 'sir'.
Factual error: The bank Steve Coogan wants to rob is in Manchester. When he sees the bank for the first time, we see a CMT bus drive past behind him. CMT buses operate in Liverpool, not Manchester.
Factual error: In the scene where the resistance blow up a German train, the locomotive is a British one. The number is shown as 92240. This engine is owned by the Bluebell railway, who are named in the credits. It wasn't even built until around 1955. It seems to be the same engine pulling the train to the concentration camp later in the film. Remarkably fast repairers, those Nazis.
Factual error: At the beginning, after the blue virus-monster appears, some telephone wires wrap around a scientist's arm. There aren't that many wires in in a normal telephone, nor are they that thick.
Factual error: Milo says Audrey is a "teenager". Which she is, but this is 1914! People didn't use that word back then. He probably should have said "adolescent" or something.
Factual error: At the end when Joe, Brandy, Clem and Charlene, the alligator woman are in Joe's 1967 Plymouth GTX, Robby claims his car is faster. Charlene chides back about his Trans Am, saying 'you think you can match that little old slant six against his 426 Hemi?" Pontiac Trans-Am's did not come with slant sixes, a Dodge motor. His was obviously a V-8, and would have most likely have been a 400, but we get the 'yours is really small' reference.
Factual error: When Hal meets Rosie's mom, she is a large woman but her hands are skinny. If someone is the size as her character, they would have large hands as well.
Suggested correction: Actually when Hal first meets Rosemary's Mom, she is shown skinny as does Rosemary through the way that Hal sees them. It's not until later in the movie after Hal's hypnosis is gone do we (and Hal) see the "real" fat mom and rosemary and their hands do look a bit larger by then.
It is obvious that Rosemary and her mother are wearing 'fat' suits as neither women are large in real life. The suggested correction in invalid as throughout the movie, the only time Rosemary's hands appear large are in spots. (eating the taffy apple when she met Jill, and rubbing Hal's cheek when he had the goop on his eyes. Yet you never see the full body with a face in those shots.) Therefore, as I stated in the factual error, when Hal meets Rosie's mom at the end (at the party), she is wearing a fat suit, but her hands and Rosie's are skinny. It's a valid movie error.
Factual error: In the end where Larry and Brian are sitting in the garage, one of them is watching a hit counter for their website, and the other is watching the news stream on the computers. When the reporter is walking up the driveway, she mentions that the site has had 18 million hits.. how did she know this? The SkullBocks server was inside the garage, so the reporters couldn't have checked before hand. And even if there was a counter on the website, they were getting 400 hits per second (1,000,000 hits takes 41 minutes). Assuming they looked at a counter, before the reporters left, it would have been a lot less then 18 million. In addition to this, when they open the garage door up, another reporter asks "How many hits have you guys registered?"
Factual error: At the end of the film when the news reporter says 'Isn't that the guy who had the skunk on the freeway?' then you hear a voice calling him back to look at the camera. This is wrong, as if they wanted his attention on the camera, then they would call him through his headset.
Factual error: There's not enough soda in two cans to soak two ninjas.
Factual error: The movie takes place in Chicago, where the police wear distinctive checkerboard bands on their caps. However, none of the officers shown in the flick wear these bands.
Factual error: The newspaper pictures are too glossy to be newsprint.
Factual error: In the movie, the over is shown to be of six balls. In 1896 the British played cricket with a five ball over.
Factual error: The whole "new cow" theory is completely false. Any farmer or anyone with common sense knows this is not true. A bull will mate with any cow in heat, whether he has been with her before or not. The entire movie is based on a sham.