Continuity mistake: In bed, the paper bag Iris gives to the cop has holes in the part of the bag that has no logo. In the corridor, we see his facial features pop from the side with a big green thank you circle. (00:31:50 - 00:32:30)
Continuity mistake: At the beginning of the interrogation of O'Malley, during the 'cancer prevention' joke the big cigar in the mouth of Coffin Ed moves to the far right corner in an obvious jump in continuity. (00:54:20)
Continuity mistake: Struck by Iris, Mrs. Hill falls to the ground (in obviously sped-up footage, incidentally) face up. As the Rev makes his unceremonious exit, she is lying on one side. (00:39:50)
Continuity mistake: Playing pool with his buddies, Reverend Deke does not hit the cue ball but rather a generic stripe. Moreover, the balls and cotton bit change position between shots. (00:46:30)
Continuity mistake: When Reverend Deke unmasks the guy in blackface, he lowers the hand he had on his shoulder. Return to the close-up: the hand is again present. (01:23:40)
Continuity mistake: When the cop strips for Iris, the zebra towel is closer to the bed than it was when he pulled it off her and put it on the ground. (00:31:35)
Continuity mistake: As Digger shoots the hippie's hat, bystanders around the white guy change position between shots. (01:05:10)
Continuity mistake: As the swindling painter tickles/pats the chin of the lady his compadre is snatching the money from, he does that with his thumb outwards or inwards as we switch from shot to reverse shot.
Continuity mistake: When the police catches the pickpocketer at the beginning, they literally lift him off the ground. There is a close-up shot in between, and the lack of continuity is apparent in the hand position of the man. Not just that: vehicles obviously disappear and appear in every cut.
Continuity mistake: Digger blocks the odd karateka fellow and pins him by the door. His hand goes from the wall, to inside the door opening between shots. Similarly, as he is talking, the camera is on Ed, who holsters (with some kinda out-of-character difficulty) his gun and places a hand on his belt, only to have the same arm fully relaxed down his side in the following shot. (00:24:55)
Factual error: It's common in movies of certain eras to have cars catch fire when in real life they would not, and the car flip that concludes the chase at the beginning of the movie offers an example of that...but goes even further, much further, when you see the armored van impacting against the roof of the flipped car causing it to explode with such violence and inferno of flames coming from within the passenger seats you'd swear it had to be driven by giant dynamite sticks with arms and legs. (00:15:25)