Factual error: Laurel shoots her husband dead and gets the fingerprints of Catwoman on the gun. When Catwoman/Patience later is interrogated for the murder, they say that her fingerprints were on the weapon that killed George Hedare. In a case like this, they would surely do a test for gunshot residue on both Patience and Laurel. The lack of GSR on Patience would at least have created certain doubts.
Factual error: In the deleted scene where Bill kills the black guy and his henchmen, Bill slits the throat of the black man, and then sheathes the sword immediately. This would cause the blood to clot the inside of the scabbard, making it sticky and difficult to draw the sword. And if left long enough, it would rust the blade. The scabbard will have to be taken apart to be cleaned properly, which would be a lot of meaningless extra work, instead of simply taking 5 seconds to wipe the blade. A swordsman of Bill's caliber would never have mistreated his weapon like that. It is like seeing a soldier deliberately burying his rifle in mud to give himself a nice, long job of cleaning afterwards.
Factual error: When any character's automatic pistol runs out of bullets, the slide doesn't lock open. All the weapons shown are of a type which should.
Factual error: On the map, Budapest is indicated to be just as large as Transylvania, or at least of the same size category. Apart from Budapest being only a city and Transylvania a pretty large county, Budapest (taking its 19th century size) is not more than 500 square kilometres while the Transylvanian region is circa 57000 square kilometres. (01:11:40)
Factual error: After the robots first attack New York City, a series of newspapers is shown. The German one is full of mistakes. It says "Sehr grosse metallic Maschinen stehlen stehlen Reserven." The word 'metallic' would be 'metallisch' in German and they would write robots as 'roboter'. 'Stehlen' (steal) is written twice. (00:15:15)
Factual error: The Great Exhibition was held in 1851, roughly 15 years before the film takes place.
Factual error: When Ford is about to start up the Y2K bike, Ice Cube's character is giving some stats on the bike like o to 200 in ten seconds, and carbon fiber chassis, he's got it all wrong. The bike does zero to 204 in 6.1 seconds and is made of aluminum; with only carbon fiber wheels, not the chassis.
Factual error: When Ryan is waiting for Jason Statham to call him back, the ringtone heard is polyphonic. The type of phone Ryan has plays monophonic ringtones only.
Factual error: In the very beginning of the film, the priest is walking through a battlefield that contains the bodies of Roman soldiers (they are wearing distinctive Roman uniforms and armor), which dates the battle no later than 6th century AD. He is holding a rosary in his hand, but the rosary wasn't introduced into the Catholic Church until the 13th century.
Factual error: In the scene when the kids are on the boat hunting the snakeheads, Amber fires at least eight shots from a six shot, snub-nose revolver. Her friend then grabs the gun and fires two more shots from it.
Factual error: The backdrop to the party scene in India shows a large building with glass windows. The Romans were the first to use glass windows some 300 years later.
Factual error: During the mess hall fight between the Sergeant and Horton, the Sergeant cuts the private's head with a cleaver and raises it "to show us". Horton's head is heard breathing and the breathing sounds react to the bug coming out of the head's mouth. I know the parasite bug makes the host's body quite resilient, but wouldn't the head still needs lungs to produce breathing sounds of that kind?
Factual error: When the pilots are over the Gulf of Mexico right before the oil rig is destroyed, one of them reports that the surface pressure is 93 millibars. That's the wrong order of magnitude for a surface pressure reading. Standard atmospheric pressure is 1000 millibars, or 1 bar. During the very worst hurricanes, surface pressure can drop slightly below 900 millibars. So the pressure reading here probably should have been 930 millibars, not 93.
Factual error: After Samuel shoots himself he is lying on the floor next to the Glock he used. The slide is locked back even though he had only one round and no empty magazine in the gun. The slide will not lock back in this configuration.
Factual error: There are many police interactions that would not take place in reality. For example. (1) All officers would be trained in vehicle use. Failure to be able to handle the vehicle would result in termination. He would have been booted from the academy. (2) When an officer is suspended, the badge, ID AND weapon are all removed by the officer in charge. In this case, only the badge was taken. (3) The officer in charge would likely only have the option of offering suspension without pay pending an emergency suspension hearing with a recommendation for termination. She could not fire him on the spot. Also, once officially fired, based on the merits of the inappropriate activities, he could not be taken back, regardless of the good deeds - past, present or future.
Factual error: In the scene where the people of Rejection/Perfection are preparing to fight the Dirt Dragons, Hereim loads the Punt Gun and puts a little gold piece in it (a percussion cap, containing a small amount of gunpowder used to set off the main charge in the barrel). He shoots at the Dragon when it pops up and misses. The next time he loads the gun, he does not replace the percussion cap (which can only be used once), yet he is still able to fire the gun with no problem and kill the Dirt Dragon.
Factual error: Marie discovers that letters in a 9th century ornament are actually Arabic numerals. Those were not introduced into Europe until the 13th century and although the numbering system was already in use in Arabia, it used different glyphs than the ones she identified.
Factual error: In the scene where Mei is bathing in that small pool, you can see on her arm a the scar from her vaccination. As you might expect, they didn't have these vaccinations in the 1800s.
Factual error: When Team America (minus Gary) go and fight the Koreans in their planes, there is a shot where rain is dripping down the front of the cockpit. If they were flying, the water should be streaming backwards off the plane because of the wind, not dribbling down.
Factual error: In the scene where Micky and Howard are discussing Livia's parking ticket, Micky mentioned that date the ticket was issued was September 5th, a Thursday. The movie takes place in 2003 where September 5th was a Friday.