Revealing mistake: The scene of rioting in the UK features a load of police officers running through a crowd. All the officers shown are wearing black tunics and custodian helmets worn with chinstraps. This is obviously old stock footage from a protest in the 80's or early 90's as nowadays, (and especially in 2012) the tunic has not been worn as general wear for well over 15 years, and Brit cops are now better equipped for protests with body armour, NATO helmets, flame retardant overalls, etc.
Revealing mistake: It is not what is seen here that is the problem, but what we don't see on the Hogwarts Express; first on the way to Hogwarts when Harry, Ron, and Hermione are in their compartment talking about Draco, and second, during holiday break, when Harry and Ron are talking about Unbreakable Vows. As the camera faces the large compartment window, we see the scenery out the window, but as the train speeds along, the scenic reflection of the windows opposite it, in the corridor, should be seen but isn't. What is reflected is the light colored wall of the compartment beneath the blacked-out window. The camera filming the shots from this angle is positioned at that window, and to hide the camera/crews' outline, the window was covered.
Revealing mistake: When John is stuck in traffic and he walks up to the other man asking if anyone was hurt, the guy looks behind John's shoulder as if the plane is coming right behind him. Then John turns around and looks right behind him as well. But the camera then pans all the way to the side to see the plane coming in before it crashes - they were looking in the wrong place.
Revealing mistake: During the final confrontation in Veidt's lair, you see the actor Billy Crudup in his SFX suit reflected in Nite Owl's goggles, not the image of Dr. Manhattan.
Revealing mistake: The film is set in 1891. After Holmes escapes from Parliament, Thomas Thornycroft's statue of Boadicea on the Thames Embankment next to Westminster Bridge can be seen, even though it was not completed until 1905. (01:35:45)
Revealing mistake: When Langdon and Victoria walk towards the Pantheon, the first two angles show them walking alone with some stunt-women behind. But in the third angle, a couple of seconds later, a huge line of people appears, lining perfectly in the back, watching the camera. Obviously a group of real tourists standing behind a security line watching the shooting.
Revealing mistake: After a shootout with Baby Face Nelson at a hotel, Melvin Purvis converses with J. Edgar Hoover over the telephone. As he says, "Our type cannot get the job done." Watch the background. You can see a modern era train move along the tracks in the darkness. This is inconsistent with the film's setting of 1933/1934.
Revealing mistake: As the boat is in its final minutes, two of the crew are shown swimming across the deck to get to the dry part. But once they've climbed up, their clothes are still dry.
Revealing mistake: When Dr. Heiter takes Katsuro from his car, you see Heiter drag him out of the back seat. He then proceeds to lift Katsuro. If you watch Katsuro's hand, you'll see he "helps" Heiter by pushing himself on the door-frame of the car (you see his hand tense as he pushes himself up).
Revealing mistake: When Sara is shaving her hair in front of the mirror, you can see the "join" between her forehead and the "skull cap" she's wearing under her hair.
Revealing mistake: During crash scenes towards the end the local traffic in the background is driving on the left hand side of the road (filmed at Darling Point, Wynnum, Australia) even though the movie is set in the USA.
Revealing mistake: When the Federation fleet is preparing to warp to Vulcan, you'll see the first ship blast off, but the second ship blasts off out of nowhere. You could argue that the ship was out of sight and below the Enterprise, but the light trail isn't that long. The light trail starts in front of the Enterprise where you should be able to see a star-ship. (00:40:45)
Revealing mistake: During the scene when Scrooge is sitting in his armchair by the fire, the animation of the fire is badly looped and you can see it flickering as it finishes a cycle.
Revealing mistake: When they are watching football, the mom walks in and says something to the family while she is holding 4 Pepsi cups in a cardboard cup holder with only one hand. If the cups were actually full, the way she was holding it it would have tipped over.
Revealing mistake: In the scene where Brian Clough is at home you can see double glazed upvc windows, even though they were not around until the 1990s.
Revealing mistake: Just after the Buick spins around to knock the trailer loose, we see the Buick speeding away backwards alongside the truck. If you look carefully you can see the REAR tires are steering, not the fronts. This car was modified with the body mounted backwards on the chassis because the transmission only has one reverse gear, so to get the speed and handling needed, the car had to be going 'forward' with a 'backward' body. (00:05:30)
Revealing mistake: When Cora and Madea are driving the mini-van to go to anger management you can see that the gear shift lever is in the up or "park" position. The lever should be in the "drive" position.
Revealing mistake: When Mr Goodall is attacking the bloke near the start, he is supposed to be hitting the other man really hard, but doesn't come close to hitting him.
Revealing mistake: When the group is leaving the dinner they are talking while standing outside in the snow. It is supposed to be in COLD Wisconsin, yet you cannot see anyone's breath as you would when someone is talking outside in the cold. (01:15:50)
Revealing mistake: Raju's website is actually a screenshot. The recycle bin is visible in the upper left corner. It can also be seen that there is no internet connection in the lower right corner of the computer. (02:40:15)