Other mistake: Louella Parsons walks out of a screening of Citizen Kane before it ends, but later tells Hearst that Rosebud was Kane's sled. She shouldn't know that, because the identity of Rosebud is only revealed in the final scene of the movie. And if she disliked the movie enough to walk out on it, it's improbable she went to see it a second time.
Other mistake: The chain "securing" the lock on the boarded up "Metro Christian Shelter" is in some inexplicable way on both sides of a 4" board that is taut between two other parallel boards. However, when the men are using the bolt cutter, the right side of the chain extends from a hole in the middle board, and the left side goes around the side of that same board and then around a pipe that is not originally there. The board that is to the left is missing. (00:17:17)
Other mistake: When the student body presidential candidates are giving their speeches, "Monarchs" is on the Gym floor, and not "Wolverines." This is because the school where it was filmed, Papillion-LaVista, their mascot is Monarchs.
Other mistake: Tony Clifton comes on the 'Taxi' stage accompanied by two prostitutes. He introduces one as Melonia, squeezes her breasts and asks 'how is our produce department?' The German subtitles read 'production department'. (00:44:25)
Other mistake: In the ending credits of this movie, it says "Cast (in order of appearance)" and the first character to be mentioned is Rose, whereas, in the beginning of the movie, Dorothy is the first one on the screen, and, the first person who talks.
Other mistake: When Porter cuts the fuel line on the car and is about to light it, Carter's henchmen see him and act surprised. Despite having ample time to get out (as any rational person might do), they just sit in the car and wait for it to explode.