Corrected entry: When the Nazi convoy enters the canyon the Nazi leader says "it must be one or two miles away from here" but if he is German wouldn't he use kilometres instead of miles?
Corrected entry: In the catacombs under the library in Venice (again) there is a mess of wrong historical references. Leaving aside the obvious difficulties of building catacombs in a city which is a LAKE, Venice was not founded until several centuries later (previously it was an empty swamp). Moreover, the sepulchre they find is obviously medieval (that is, even several centuries older than that) and the inscription on it is done in "romantic" XIX Century gothic style.
Corrected entry: When Indiana Jones bumps into Adolf Hitler. Hitler takes the book from Indiana's hand, gets a pencil and signs his autograph. The signature finally used in the Close Up was readable. The real Hitler signature was unreadable. They originally had a signature expert to do this, but they decided to change it so that the audience could read it.
Corrected entry: For the first challenge "only the penitent man will pass", Indy realises that he must kneel. The first blade does miss him, but what about the second blade? Anyone else who kneeled as the instructions pointed out would have been killed by the second blade coming through the floor (which Indy somersaulted over after kneeling).
Corrected entry: After being pursued by the protectors of the grail in the streets of Venice, Indy and Else Schneider leap into a boat. As it's gaining momentum to speed off, we see one of the protectors hurl himself onto the back and roll over - we see him just about to fall off the edge. The shot then cuts to Else and Indy, and when the back of the boat is filmed again, the protector is securely gripping the rear of the boat.
Corrected entry: The biplane attached to the airship is obviously meant as fighter support in case the zeppelin is attacked (after all, it is armed with a rear machine gun). The only problem is that it is an aged German D-VII from World War I. These planes were no longer built after 1918, and all common military planes of 1938 were vastly superior to the old biplanes. Why would you try to protect an airship with a 20-year-old biplane?
Corrected entry: Indy is being chased through Venice by the Brotherhood of the Fez. At this point he assumes they are bad guys and thinks nothing of killing a few of them. Then he has a fight with Kazeem and finds out that they aren't actually baddies. Kazeem seems quite happy to leave it at that and doesn't appear to mind that half his colleagues have in fact just been killed for no good reason.
Corrected entry: At the book signing in Berlin, the camera pans from right to left and the guard at the very end of the line of soldiers (to the left) has his left hand raised in military salute to Hitler. All the other soldiers have their right hands extended.
Corrected entry: When the tank driver has been shot, he leans on one of the levers. The tank slews round, saving Indy. In the next shot it shows the tank heading straight forward. This would not happen if the driver is still leaning on the lever. Even if one of the crew takes over, they would see the canyon up ahead and steer away from it.