Corrected entry: When Indy is questioning a local peasant in Cuzco moments after arriving, the music being heard is distinctively Mexican when it should have been Andean.
Corrected entry: After going over the last waterfall, everyone bails out of the boat in mid-air but when we see Marion again she is holding the steering wheel as if she held on the whole time.
Corrected entry: The characters refer to the local natives as Mayan. Incas are native to Peru, Mayans to Central America, and Aztecs to Mexico.
Corrected entry: When the characters are wading out of the river onto the shore (after the waterfall scene), a metal swimming pool ladder can be seen in the lower right corner of the screen.
Corrected entry: In the warehouse, no one thinks to track down the magnetic artifact by using a simple compass.
Corrected entry: When Indy escapes on the rocket powered cart, it is slowed down by a lot of sand on the tracks, but in the next shot, all the sand has disappeared.
Corrected entry: On the scene where they are at the cemetery in Nazca, they show the Nazca lines right off the cemetery. These lines are so big that you need to be in a plane to actually see them. They are about 8 kms long each, and from the top of the hill in the movie they show at least three of them.
Corrected entry: In the chase scene around the campus Mutts' motorcycle has a belt drive. Harley Davidson did not make belt drive bikes until two decades later.
Corrected entry: The Jeeps used during the Russians entry to Nevada was wrong. In 1957 the Army drove the Jeep Willys (early CJ) with wing fenders on front. The ones driven in the movie had round fenders.
Corrected entry: In the opening scene, the soviet throws Indy's hat onto the ground, one can see that the hat is out of shape and smashed in, yet when Indy picks it up to put it on it has the perfect signature shape.
Corrected entry: In the scene Where Indy is being attacked, in the cemetery, the sidekick is about to be shot with a dart, Indy pops up and blows into the other end killing him. That would have only been possible had the dart been pointing towards the original attacker.
Corrected entry: One of the characters says that the Conquistador took the skull in the "Fifteenth Century." The Fifteenth Century ended in 1501, while the first Conquistadors did not come to the Americas until several years later.
Corrected entry: Indy blowing the poison dart back into the mouth of the attacker is almost identical to a scene in a previous Spielberg-produced (but Barry Levinson directed) film. In "Young Sherlock Holmes" (1985) Sherlock dispatches Mrs. Dribb by blowing a dart into her mouth in the exact same manner.
Corrected entry: In the scene where they travel to South America, the plane shown is an older Pan Am twin-engine aircraft (a DC-3, I believe), perhaps intended as a tongue-in-cheek tribute to the earlier films. In reality, in 1957 Pan Am was flying Douglas DC-6, DC-7 and (possibly) Lockheed Constellation aircraft - all large 4-engine piston aircraft - on its Latin American routes. The Boeing 707 was only two years away.
Corrected entry: In the last scene when Ox is speaking to the inter dimensional being, Indy says he is speaking Mayan, however the language he is speaking sounds nothing like Mayan.