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: When Helvetica is on the rocket bike, her hair doesn't move.
Revealing mistake: During the distant shot when Mary, the reporter and little girl are first coming up out of the hole, the cable going back down into the hole is barely taut and moving around too freely to actually be pulling that much weight up even for a steel cable.
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: During the ophthalmologist scene, when they zoom into the view of Casey's eye you can see the ring of the contact lens used to create the pigment change special effect.
Revealing mistake: When William is running at the end, there is already a blood trail on the floor. Clearly from another take. (01:15:10)
Revealing mistake: Near the end of the film, Meryl Streep and Alec Baldwin are sitting on a lawn swing. The number of chains supporting the swing varies between shots. Sometimes the back stay is a single chain and sometimes it is a double chain.
Suggested correction: The swing supports never change. There's suspending chains on both sides of the bench; both chains are each attached to another chain with (2) connection points, one on the lower front and one on the upper back (4 points total on the bench).
Revealing mistake: When Margaret falls from the boat, she is floating with her shoulders well above the water, probably due to a hidden flotation device. Her outfit was too tight to trap any air for buoyancy, and a fully clothed person would normally be up to their neck in the water.
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: In the scene where the Bear Jew beats the German Sergeant to death with a baseball bat, the sergeant's head basically explodes into a mass of blood at the end of the beating. In a later shot, the sergeant's body is shown lying on the ground with the head intact. (00:33:10)
Revealing mistake: During the four-year flashback scene in East Africa, after the building is bombed, two helicopters fly to the right of the building. However, because they are CGI, the telltale whirl (or any movement) the blades should have made in the smoke isn't there. (00:50:10)
Revealing mistake: When Christine is looking at the obituaries in the café, one of them is for Fredericka S. Freund. However, once you get past the first paragraph the obituary seems to be for Dr. Mary Allen Engle (nee English). Also, they forgot to put "Dr." before Freund's name. It may not be a coincidence that the Property Master for the movie is named Ellen Freund. (01:25:00)
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: Just after the submarine crew see all the whales passing them by, the shot switches back to the helicopter and all the dials on the console. If you look closely, you can see that the image has been flipped as all the words and numbers are the wrong way around. (00:05:20)
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 Vang and Chev are running and about to jump the fence into the power station, look in the fence and you can see the handy foot holds that the actors use to go over the fence.
Revealing mistake: Susan appears to pass right through the glass window after knocking down Gallaxhar.
Revealing mistake: During the scene where the four Ninjas dressed in black have a pillow fight with the 'Girl' Ninja dressed in white, you can see that it's not the little girl fighting them, but a tall 'Oriental Man' stunt double instead.
Revealing mistake: During the opening scenes, just before the "double tap rule" a car hits a zombie in a security guard uniform. The windshield breaks a split second before the zombie hits it.
Suggested correction: The glass breaks at absolutely the right moment just when the zombie hits it.