
Revealing mistake: When The Mask is dancing with Tina and he turns her into a human tornado while spinning her around, none of the onlookers in the crowd show the slightest bit of amazement at the impossible feat that just occurred in front of them, indicating that the extras were not directed to react to the special effects.

Plot hole: In the end, all they have to do is ask the President, when he's conscious (Liev didn't kill him; he just knocked him unconscious), who killed everyone in the control room and nearly killed him. He would know who the traitor is and it's not Salt - when they look back at the facts, they'll see how Salt only killed when she absolutely had to, and how she saved lives and stopped a 3rd world war.

Other mistake: When Christian Slater shoots 9 or 10 shots out of a 6-shooter, there is no possible way that he could have had time to reload in the time allotted.

Plot hole: During the later parts of this movie there is much talk about 'continental displacement' and this appears to be happening in the film. The Earth's crust is falling apart because of the heating of the inner core, and all the cities seems to be falling apart since the ground can no longer hold them. When our cast finds themselves surprised to be already over China when they figured to be over the ocean, it is explained that Asia has actually moved from where it was. If this phenomenon is taking place globally, how come the monks in China don't seem to have been disturbed at all? In fact the bell the monk rings as the ocean approaches hasn't even been shaken. The arks are built in between the mountains, but the mountains are apparently fine. Shouldn't they be falling like the rest of the crust?

Revealing mistake: While Indy and Marion are in the Well of Souls, and they encounter the snakes, Indy falls to the ground only to be confronted by a hissing Cobra rearing its head. Look carefully and you'll see the snake's reflection on the safety glass between it and Indy. Briefly you can also see the torch's reflection while he's waving it around. You can also see Marion's reflection when she falls in later on and is face to face with the cobra. [This has been corrected in the new DVD set. You can only see it if you have the original VHS. I think it's visible in the "making of" on the DVD as well.]

Factual error: Carol Danvers' name appears on her dog tags as "Carol Danvers," but US military dog tags list the surname first, then given name. E.g. "Danvers, Carol."

Continuity mistake: In the opening scenes where he gets his mustang back, he hits the guy who comes over the roof and busts the windshield, but in the very next shot the windshield is pristine. (00:07:45)

Revealing mistake: In the final scene where Fonda and Holbrook are looking over the carrier at the crowds on the dock you can see that only the first rows of people are dressed in period clothes, the rest of the crowd are dressed as they would have been in 1976 when the film was made.

Other mistake: There is a scene in which Piter DeVries is talking about the Landsraad (one of the governmental organizations in Dune). Twice he mispronounces the name, saying "Lansdraad" instead.

Factual error: In one scene they are playing on an Xbox 360, but the Xbox 360 did not come out until 2005, and the game being played, Gears of War, wasn't released until 2006. The movie takes place in 2004.

Factual error: The poem Isolde recites, John Donne's "The Good-Morrow", is a 17th-century work, which is centuries later than the movie's time period.

Factual error: The idea of two spacecraft blasting off together so close to each other at the same time is a joke. One would put the other at great risk. Not only is there massive fire and heat, but the vibrations from the noise of the exhaust do great damage to the surroundings. And there is great inconsistency about just how close the two spacecraft really are. The first still shot taken in the dark has them at different towers about 150 yards apart. But, then all the men take an elevator up ONE tower and are split apart into the two groups at the top of the tower. Furthermore, the launch takes place at Kennedy Space Center Launch Complex 39: the fixed and rotating service structures built for the Space Shuttle are visible. The pads at LC 39 are 8,700 feet apart (just over 1.5 miles). (01:00:00)

Other mistake: Spock lifts his crew mates with the rocket boots. He passes deck numbers 35 through 78 from bottom to top. First off, deck numbers go from top to bottom. The bridge is on deck 1. Second, the Enterprise of that class only had 23 decks.

Factual error: In the first scene where Dr Strange is preparing for surgery he uses improper surgical gowning technique breaking aseptic protocols. Strange puts on a mask after washing his hands, contaminating his clean hands by bringing them in proximity to the non-sterile environment of his face. Surgical masks must be worn before the full washing of hands. Another error is that he inserted his hands all the way through his gown to don gloves. Hands must never leave the sleeves and gloves must be put on with the sleeves still covering.

Other mistake: At the end of the film when they arrive in NYC looking for the library, we know that they survived because they are inside with a roaring fire burning. But where is the smoke up above, as Jack Hall approaches? There must be a chimney, or else they would have all died of asphyxiation.
Suggested correction: As already corrected, just because we can't see an outlet for the smoke doesn't mean there isn't one. White smoke against white snow is very hard to see.
But they were still burning the books, which meant the smoke should be black, if they stop burning the books, the smoke would have been white, which isn't the case in the movie.

Plot hole: The whole concept of a kidnapper 'pretending' his victim didn't get on the plane in the first place is utterly laughable. Even if nobody saw her in her seat, why didn't they see her walking down the aisle to her seat, or waiting to board the plane, or in the boarding tunnel itself? Why isn't she listed on the passenger manifest, or on her mother's travel documents or airline ticket? And there would have been security cameras all over the airport.

Plot hole: The "video history" of the crashed USAF ship makes it very clear that the planet is uninhabited when they "landed". I can understand how a race of apes develops - they had a bunch of them on board. I can understand how a race of humans develops - they are descendants of the original crew. What I don't understand is...where the heck did all the horses come from?
Suggested correction: Humans refer to parts of their own planet as uninhabited even though they are crawling with animals - vast areas of the Arctic are "uninhabited" even though polar bears and seals are found there. Were we to find a planet with nothing but primitive horses on it, we would label it as uninhabited. Apes and humans came from the crashed spaceship, horses were always there.
Which still makes no sense whatsoever.
I agree with you Charles. Horses are native to Earth but, the Oberon lands on a planet light years from Earth so it's a big plot hole how horses from one planet could end up on another when the planet was not only uninhabited but, the Oberon was believed to be lost.
Again, the Oberon was a massive space station, genetically experimenting with many earthly lifeforms, including horses, apparently. The time/space-rift was very near Earth (Mark Wahlberg made the journey in about 25 seconds at the end of the film. Not years but seconds). The implication is that the Oberon passed through the rift, and much of the crew survived to continue their genetic research on what later became the Ape Planet. So, the Oberon initially arrived on a barren planet and introduced all of the biological and botanical species, including apes, horses, and everything else.
Suggested correction: According to the backstory, the space station Oberon was dedicated to genetic modification sciences. They were actually experimenting with animal genes in the safety of space (which kind of makes sense). Given that the Oberon was a truly gigantic space station, it's not too much of a speculation that they were experimenting on many different types of animals (not just apes). When the Oberon crashed on Ashlar, half its crew was killed, but half survived with a number of ship's systems still functional, and they continued their genetic research, possibly producing a number of Earthly species on the otherwise uninhabited planet.
I think this should've been posted as a question, rather than a plot hole.
That's just a wild guess. There hasn't been a single mention of horses on board the Oberon. Even if there were, why only horses?
Wild guess? The Oberon was experimenting in genetic modification, which implies a broad range of research...and not just on great apes. The Oberon was gigantic enough to be an Ark.
So where are all the other animals?
Exactly. Where are the birds, lions, lizards, etc?

Continuity mistake: Right after Bennett takes off in the plane, Claire throws a gun to Alice. Between the slow-motion shots, the gun switches position in mid-air before Alice catches it. In the shot of Claire throwing it, the barrel is facing to the right, meaning that it should be facing to the left in the shot of Alice catching it. But it still faces the right when she does. (00:58:30)

Revealing mistake: When Will Scarlet finds the injured Much in Sherwood Forest about three quarters of the way through the movie, a white vehicle can be seen travelling from right to left in the background. (01:27:40)
Suggested correction: No car, just light on the hilt of Scarlett's sword.
I verified the scene. It's definitely not from the light of Scarlett's sword. It occurs after Will gets off his horse and the horse is turning. To the right of the horse is a tree in the background. To the right of that is a small clearing, about level with the horse's mouth. For a fraction of a second you can see a white object go across the small clearing in the same manner as a white car driving by.

Revealing mistake: The kid in the wheelchair is playing a Game Gear with no game in it.