Continuity mistake: After the gang is pulled off the bank job, they race away in the three Minis - as they go through a tunnel at one point they roll up and down the sides of the tunnel. The mistake is that each car supposedly has two occupants, but on one shot of the cars in the tunnel, one car has only a single occupant - visible because the car following has his headlights on illuminating the car in front.
Continuity mistake: During the infamous scene where Barbara Windsor loses her bikini top, Hattie Jacques is shown several times, but her hat disappears in one shot, reappearing in the next, and so on.
Continuity mistake: The chain gang truck is an International-Harvester when it first pulls to the side of the road. When the guards open the hood, the truck is a Chevrolet.
Continuity mistake: Gladstone has a drink in Dr Nookey's office, but he doesn't pour it. It just appears in his hand.
Continuity mistake: When Frosty gets off the train because Karen gets sick, from the magician's view it appears the train is slowing down and is very close to Frosty, but when the shot goes back to the magician, the train appears to be going much faster and is much further away.
Continuity mistake: The Danbys ride in with 13 gunmen. Prudy kills two. Both are shown lying dead in the middle of the street. A few minutes later both dead Danbys are missing from the street and there are once again 13 live Danbys facing Joe stretched over the cannon.
Continuity mistake: When Cornelius meets the girl in the red dress and they dance and sing outdoors on the street, her dress is dragging on the pavement and the hem is clearly filthy. The next scene they arrive at the restaurant and her dress is clean and pressed.
Continuity mistake: In the restaurant kitchen scene, Carol Sanders takes hold of the waiter's left hand. In the next shot, she is holding his right hand.
Continuity mistake: At the end of the town collapse, a sincerely drunk Ben dives head-on into a tub where a lady (in her underclothes?) is just enjoying a bath. Propelled by Ben's momentum the tub with both passengers slides down the slippery planks and splashes into the river, while Ben rearranges himself into a comfortable sitting position between shots. If I wasn't completely mistaken also the lady changes her outfit, since the embroidery is missing when they float along. (02:23:35)
Continuity mistake: When Charlie Brown is doing the dog food for Snoopy, the amount of food in Snoopy's dish changes between the kitchen and the dog house.
Continuity mistake: A hospital nurse hands a cup of water to Billy Bright, so he can take some medication. In the next scene, the cup is back on the nurse's tray and Billy picks it up himself.
Continuity mistake: Professor Quigley shows his students a grocery list, and then demonstrates how a computer can be used to make a phone call to the grocer's and place the order by playing a recorded message. However, the grocery items named on the recording do not match the items on the list.