
Factual error: The vents that Hunt and his sidekick crawl down at CIA Headquarters are standard galvanized steel box vents; they are very common in the building trade. Try walking or crawling down one - you'll make a noise like the sky is falling down. People will be able to hear you for miles. Every person in that building would know somebody crawling about in the vent system. (This error applies to dozens of films, not only this one).

Factual error: In circling over Washington Dulles, a plane would fly over several airports that they could land at with perfect communication, including Richmond, Baltimore, Andrews AFB, etc. Also, there is no communication from the airport to the plane but the plane would be in range of no fewer than 15 transmitting stations that could have relayed messages.

Factual error: Why is Hilts not wearing a uniform? A serving officer captured behind enemy lines in civilian clothing risked being shot as a spy. If a prisoner's uniform was too worn or damaged to wear, it was routine for the German authorities to replace it - a P.O.W. in civilian clothes is an obvious escape risk. He is wearing a pair of tan chinos, a cut off sloppy Joe sweatshirt, both ridiculously anachronistic - Sixties hipster fashions - and nowhere even close to a World War 2 uniform. He is also wearing Army Type III Service boots - something that would never have been issued to a fighter pilot.

Factual error: Near the end of the film Knox is flying a Huey helicopter and the Angels hitch a ride by shooting it with a spear gun and dangling on the line behind it. Suddenly adding about 200kgs to a Huey in flight like that is going to cause all sorts of problems with the trim and airspeed of the aircraft - the pilot would know immediately that something was wrong. (01:23:20)

Factual error: The movie starts in 1985, jumps '5 years later' and then back to Sasha Luss, then '3 years earlier'. So, in her crusty apartment in an impoverished neighbourhood of 1987 Soviet Russia, Anna is filling a form on her notebook-style laptop, too modern for the era. It looks like a NEC UltraLite (considered the first notebook style laptop) which didn't even come out until 1989, let alone the likelihood of someone in the USSR having one.

Factual error: While handling the ignition coil cable to the distributor cap, Joe Pesci tells De Niro that the timing chain needs adjustment in his truck. A truck of that year with an inline Chevy motor would not have a timing chain at all, instead this truck would be equipped with a direct drive timing gear. Even if it had a timing chain, it would be behind the water pump and a cover. It would have been a several hour job to replace, not possible to adjust it.

Factual error: The whole basis of the trial and conviction of Cameron Poe is a crock. The judge can not arbitrarily mete out a sentence that is harsher based on the ability of someone to defend him/herself. In justifying the harsher sentence because of Poe's military skills, the judge effectively says that Poe is more guilty than an average person due to his honorable and decorated service in uniform to his country. In my entire time in law school, I never read one out of the literally hundreds of cases I was assigned in which a judge issued a harsher sentence because of someone's innate or learned abilities to defend themselves. But since this was a movie court room proceeding, the fact that Poe had a witness to the fight (his wife), the fact that he was injured in the fight, and the fact that his uniform was torn and otherwise ruined as a result of the fight are never examined. A D.A. wouldn't have taken this to a grand jury on a bet, because they would have never returned an indictment or "true bill."

Factual error: In the scene when Will is opening the drawer of films from the Leeds home, there is clearly a copy of Mrs. Doubtfire in the left column of tapes. How can that be? Red Dragon is clearly set "several years" after 1980, as the caption says, but before the 1991 Silence of the Lambs, but "Mrs. Doubtfire" came out in 1993.

Factual error: When we see the burning 'DD' in Joe Pantoliano's glasses it is not a reflection. The DD should be backwards in his glasses. (00:26:55)

Factual error: Fitch, who professes qualifications in biology, genetics and biochemistry, says that they made Sil female because she's a natural predator and so she'd be more docile. He should retake his finals. In every single species of predator on earth - every single one - the females are the hunters, aggressors and killers. The males may be socially dominant but they are the 'docile' ones. There are no exceptions - and no human DNA was used to create Sil - they used synthetic DNA based on the instructions transmitted to them.
Suggested correction: They never said Sil was a natural predator when they created her. She was half human and half alien and it was their belief that human females are more docile (i.e. more motherly, more gentle, more empathetic, and less aggressive than human males). Although the reply to "more docile and controllable" was "you guys don't get out much", meaning that girls aren't that docile and controllable.

Factual error: Trevor - a Professor of Geology - boasts about having an article published in Scientific American, and that is not something any scientist would do. Scientific American is looked upon with slight disdain by the scientific community, considered to be a populist crowd pleaser. It is not even peer reviewed. Considering that he has just turned the geological and archaeological worlds on their heads he would have been better off publishing in Journal of Geological Research or Geology, both prestigious professional journals.

Factual error: During CONTROL's paintball training session, a barrel view of a bullet exiting the gun is shown as it travels to its target. However, the entire bullet is shown, casing and all, instead of just the bullet. (00:09:10)

Factual error: The movie is supposed to take place in and around New York City, however during the car chase where Angelina and Brad are fighting off the three BMW's, a wide shot clearly shows a street sign announcing Los Angeles.

Factual error: When Brendan Fraser & his son are running to reach the pyramid before the sun hits it, the sunrise line approaches the pyramid along the ground, but the sun would naturally have hit the pyramid at the top first and worked its way down to the ground. [Some people insist on trying to correct this - think of it this way. If the sun's illuminating the ground from way up in the sky, what's keeping something higher up than the ground in darkness?] (01:34:40)
Suggested correction: Despite the additional comments this posting is wrong. The terminator line - the distinct boundary between sunlit day and dark night - moves horizontally across the surface of the earth, from east to west. It is perfectly feasible for the land behind Rick (i.e. to the east) to be in bright sunlight while the pyramid - to the west - is still in darkness. What is not feasible is anyone outrunning the terminator line, which moves at around 1500 kmh in the latitudes they are in.
Try it for yourself - get a round object, such as a basketball, a map tack and a flashlight. As you shine the flashlight on the ball you will see the equivalent of the day/night terminator line. Now stick the map tack into the ball and slowly rotate the ball with the light still shining on it. As it moves, the terminator moves and the map tack will become illuminated before the surface of the ball at the base of the tack. The light will move down from the top of the tack. The only way it would work as shown in the movie is if everything is exactly flat - with no differences in altitude above the ground. Obviously that is not the case. (Of course, if you don't want to poke holes in your basketball, you can use any combination of something round and something to stick to it.)
The original post is correct. Because of its sheer height, the top of the pyramid would receive direct sunlight first, just as a mountaintop receives sunlight before it appears on level ground.
It is perfectly possible for a mountain to be in complete darkness and the low lying land nearby to be brightly sunlit if the mountain is to the west and has not yet been reached by the terminator line. I repeat, the terminator line moves horizontally (in all practical terms) across the surface of the earth and as a result anything west of the line will be in darkness regardless of its height and will stay that way until the line reaches it.
Look, you're talking about mountains miles away beyond the terminator (so far away that they would be beyond the range of sight anyway). We are talking about a pyramid, easily the tallest thing in the immediate vicinity, in the near background, only a mile away at most. Under the physical conditions and locations present in this film, the pyramid should be illuminated top-down. Period.

Factual error: Gorillas are almost exclusively herbivores. They have been observed eating small insects and grubs but nothing larger. So why does Isabelle eat a rat at the beginning of the film? The serum may have turned her into a crazed killer, as it does with Sebastian, but it hasn't changed the structure of her teeth and palate, biochemistry of her digestive system and so on, all of which would be required. She might kill or torture the rat, but she'd never eat it.
Suggested correction: This entry is wrong. Gorillas can, and do eat meat, so the actions of the gorilla are believable. From feedingnature.com: "Gorillas will sometimes eat meat. They can catch small animals such as mice, rats, or birds and will eat these animals if they lack protein in their diet. The silverback gorilla has been known to eat meat and might even attack and eat other primates." Even if you dispute this fact, most people would believe that a gorilla is certainly capable of eating a rat.
Suggested correction: Gorillas do sometimes eat meat, especially small animals. Also, Isabelle may not be getting fed the right foods resorting to her eating a rat. Humans will resort to drinking their own urine without access to water for a period of time, it's not far fetched that a gorilla will eat something that will be harmful to its body in a similar circumstance.
Gorillas do NOT eat rats. Inventing Deus Ex Machina explanations for a factual error (Isabelle was underfed so she was desperate for food!) does not invalidate the error. The posting needs a little more detail but is absolutely correct.
But she didn't eat it regardless so everyone is making the same mistake (she bit it, perhaps from the rage side effect?).
Nonsense. She picks up the rat, bites it in half, and swallows it. If she spat it out, we'd see it. As we see later in the film, anything ingested by an invisible creature instantly becomes invisible, so why don't we see a bloodied half rat splatter on the cage floor? Because Isabelle chewed it up and swallowed it.
Wild gorillas have been documented (on camera) feeding on freshly-killed monkeys. Like chimpanzees and humans, gorillas are omnivores and are perfectly capable of eating and digesting raw meat.
I think speculation about her eating it because she's not fed a proper diet isn't valid. But it's plausible the serum made her vicious where she ate the rat. To say her teeth and digestive system are the reason why she wouldn't/couldn't eat the rat isn't valid either. My dog once ate my sock despite not having the teeth or digestive system required to eat socks.
To add, it was noted that the gorilla's mind has been affected by being invisible for so long causing her to be more aggressive. Especially when she bit Matt's hand.

Factual error: Based on the films being shown at the theater, the movie appears to be set in 1981. One of the TV commercials shows the Energizer Bunny, which didn't make its first appearance until 1988.

Factual error: The hat that Brad Pitt wears in the 1985 scenes is a Padres hat with navy, orange and white as the colours. In 1985, the Padres' colors were brown and yellow. The color change didn't come until late 80's or early 90's.

Factual error: Basic physics - Hancock throws Michel from a dead stop to above cloud level in about eleven seconds. The clouds are bog standard cumulus which form at around 7,000 metres in temperate zones. This means that Michel accelerates to about 700 metres per second instantly, from a dead stop. Obviously he cannot accelerate during his ascent, so his starting speed has to be at least that. (In fact he would have to start his ascent much, much faster than 700 metres per second as he would be constantly decelerating due to gravity and air resistance, but it will do as a start point.) Michel accelerates from 0 to 2,520 kilometres per hour - twice the speed of sound - in zero seconds. He would be accelerating at around 5000 Gs, turning him into a very long streak of fine, pink mist.

Factual error: The 15 bus in London does not go over Westminster Bridge.

Factual error: The time period of the movie is 2054. There is an election day (April 22nd) that is on a billboard and then announced as a Tuesday. However, April 22nd, 2054 is actually on a Wednesday.
Suggested correction: Knox wasn't a trained pilot. Either he had no clue to what was going on, or he thought something may have been wrong, but didn't know what to do about it.
Taking off and landing a helicopter are by far the most intense and difficult part of a pilot's training. Seriously, 99% of learning to fly is learning how to land and take off. If the pilot is skilled enough to take off in a Huey he is easily skilled enough to notice a massive additional drag on his helicopter due to the additional weight of the angels and the air resistance put up by such a bulky protrusion on his aircraft. If he isn't skilled enough to notice that, he isn't skilled enough to take off in the first place.