Revealing mistake: During the beginning, as the newspaper headlines roll, the small text in the articles is actually the same text repeating itself over and over again, something like: "an investigation issued."
Factual error: Pierrepoint is depicted as having a London accent. In real life, however, he was from the north of England, and had a Yorkshire accent, which sounds completely different. This is proved in a BBC interview with him, dating from the 1970s.
Visible crew/equipment: When Frank and Tracy are about to surrender at the hotel and the cops start shooting, Frank yells "What the hell is going on here?" Frank then hides behind the car and you briefly can see the boom mike reflected in the car window. (00:52:20)
Continuity mistake: The part where Corky drives Victoria through LA must have been composed from two takes, one where Corky has more rouge on her cheeks and only a small streak of dirt on her cheek (from an earlier car repair), and another one with almost no make up and an oil streak that goes from her ear to her nose.
Continuity mistake: When the Pope sneaks up behind Cardinal Rocco in the basement, in some shots the Cardinal has a drink in his right hand, in others he doesn't.
Continuity mistake: Once in the subtitles her name is written as Edna (her name is Emma).
Other mistake: When Joe Huff goes to the fight pit and jumps in, he has on fingerless gloves. However, during the fight he is barehanded and when the shot returns to Joe Huff he has the gloves on again.
Factual error: In one of the train cars on the way out west, upon being asked by one of his henchman, "When are we going to eat the mice?" Cat R. Wahl replies, "Which would you rather have, the crouton or the entire Caesar salad?" Caesar salad was not invented until the 1920's and the movie takes place in the late 1800's.
Other mistake: In the 7th game of the season, a scoreboard shows the score with about 3:08 to go in the game as 43-12, but next the announcer says they lost 35 to 12.
Visible crew/equipment: When Wanda comes into the room and Blade comes after her, a lamp drops off the table when she knocks it, but before it completely falls, a crewmember's hand can be seen grabbing it. (01:04:15)
Revealing mistake: When Henry is out on the balcony and Sara comes out carrying a bottle of beer, Henry is leaning with his elbows resting on a ledge. It can be seen that there is some kind of pad or cushion on there because you can see it give when he moves. When they sit the beer bottle down on there the sound effects of one touching stone or concrete can be heard. That should not be heard if the bottle touches the pad or cushion that is on there.
Continuity mistake: Chuckie falls into the river. When Bingo rescues him, his bike is in a different place in the river.
Continuity mistake: When Barton is talking to the film maker about writing the film the film maker has on a military uniform. As the scenes go back and forth between him and Barton the military ribbons come undone on one side and then miraculously return to normal.
Continuity mistake: There is a long sequence where the guy is talking to J. Roberts - I think its when they are at a beach house or cabin. The shots switch from him to her, in tight shots on their face. Watch him and you'll see his sideburns change lengths right before your eyes.
Continuity mistake: As William Lee types the "Report On The Assassination" in the café, letters that were visible in a previous shot disappear. (00:32:10)
Plot hole: Spoiler Warning. It turns out that Dan Merrick is actually Jack Stanton after a whole lot of reconstructive surgery to make him look like Dan Merrick. Everything is believable except that he has Dan Merrick's voice as well. He should have Jack Stanton's voice.
Continuity mistake: In the Fish and Chip van, the guy with the pony tail says, "I'm going to fart." The next few shots have his head alternating in different positions even though there was no time for him to move.
Revealing mistake: When the devil man (Bruce Payne) comes up from under his couch in his caravan, and pushes the mayor through the ceiling - they make no attempt to hide the fact that it is a dummy and its hands are gripping some special handles.
Continuity mistake: During the catapult launch for the SAM suppression mission, we can see two Shrike missiles on the right wing pylons. In the next shot, there is only one. At this point they still haven't reached the SAM site so they wouldn't need to fire one. A little later in another shot (right before they switch to active radar) we see two Shrikes again.
Other mistake: When the paperboy throws a newspaper at Hulk Hogan, and he throws it back, hits him and he falls off his bike into a bush. If you look closely, you can see him run into the bush, instead of being knocked into it.