Audio problem: When Callahan gets out of his car to stake out the robbery, he shuts the car door, and the sound of the door closing is heard after the door is shut.
Audio problem: In the scenes aboard the train, you can hear the railroad crossing signal. But in the scene there is no road or highway crossing the tracks, only forest or open field. This happens al least 8 times along the film.
Audio problem: Rizzo gets interrupted in his 'conversation' with Tom; he shoves away the guy with the horseshoe moustache, sending him offscreen. A noise of broken glasses and cracked wood is added, but in the following part of the scene the club is undisturbed, with a couple nearby and every table intact. It's only a minute later when the big guy comes back with a vengeance, that stuff starts breaking and people acknowledge violence happening nearby. (00:36:40)