Deliberate mistake: In the shot near the end of the film where Donnie grabs the keys for the station wagon, you can see a Blockbuster Video member card in a cup. That card design wasn't used until the mid to late 1990's. This movie is set in 1988. Deliberate as it's a product placement, but still wrong. (01:37:10)
Deliberate mistake: The 'NNN' news program shows a picture of some animal crackers in Frank's stomach. The problem is, they are still all in one piece and are pretty big. I don't think Frank would swallow them whole.
Deliberate mistake: When Boyd has saved the Vice President's life after chucking him into the water, Boyd looks down at the VP who is being dragged out. Suddenly, there is a picture taken that appears in papers, but there was no press or person on the bridge where Boyd is with a camera, so where did the photograph come from? (00:06:55)
Deliberate mistake: Paige's stunt double being thrown into the hot tub is obvious. (01:14:25)
Deliberate mistake: There is no way Ichi's blade could have cut the one man vertically in half, as shown in the movie. The blade is only a couple of inches long, not nearly enough to slice through the man. When we see the blade shooting through the back of him, it is obviously a different, longer blade.
Deliberate mistake: According to the DVD version, the Army of Anubis roars in ARABIC. Rather strange for a monstrous army of an ancient Egyptian god... (01:44:15)
Deliberate mistake: The French NATO rescue team is flying an old, Russian-made Mi-17 helicopter which is not in service in France. It was probably rented in Slovakia where most of the film was shot. The Mi-17 is easily distinguished from the French multi-purpose helicopter Puma: the Mi-17's landing gear is supported by huge rods, its side windows are round, and it has a sleek boom with the tail rotor on the left side. The Puma has smaller gear support, rectangular side windows, and a thicker boom with the tail rotor on the right side. (01:15:42)
Deliberate mistake: The tanks used in the film are German "Leopards", never used by the US army.
Deliberate mistake: During the final scene, where Dom and Brian are dragging, you clearly hear that the Dom's car is straight piped. When the Charger (Dom's car) is spinning, you see that the car has a complete exhaust system.
Deliberate mistake: When the captain jumps towards Scott, the distance between the two rows of seats is three times bigger than the other rows shown, obviously to allow for the fight, but still really weird when you look at it.
Deliberate mistake: In Silence of the Lambs Starling was right-handed. In Hannibal she is left handed because we see her writing with her left. Julianne Moore, the new actress who plays Starling is left handed whereas Jodie Foster was obviously right-handed.
Deliberate mistake: Frequently during the movie, British surgeons are referred to as "Doctor". In Britain, surgeons are always referred to as "Mister"; this is a hold-over from the surgeon's non-medical past (barbers, etc). This would likely be confusing to American audiences.