Continuity mistake: When Butch and the other cats tiptoe past Spike at the start of the cartoon, you can see that Spike's bone is next to his kennel, but when Jerry is thrown out of the house by the cats before the film begins, he lands in Spike's mouth and the bone is now next to Spike.
Continuity mistake: When Humphrey Bogart comes into the kitchen after being hit in the face by a coconut custard pie, the number of cream spots on his dinner jacket changes between shots.
Continuity mistake: When the cat places the tiny canary on to the plate, the salt and pepper pots on the table change positions between shots, and the cabinets in the background disappear. He also has a knife and fork in his hands, but after the canary says he's been sick, we return to the cat and the knife and fork have disappeared.
Continuity mistake: When the Gophers hear Elmer Fudd and the furniture salesman coming, they hide in the bottom drawer, but when Elmer drives home, the Gophers are now hiding in the second drawer down.
Revealing mistake: When the lady throws Sylvester through the window, you can see there is a bump on Sylvester's head before he hits the tree.
Revealing mistake: When the mice are feeding the cat, the cat sits up and a mouse passes through his head.
Continuity mistake: When Jerry and one of the puppies hear Tom whistling during the thunderstorm, you can see that there is a newspaper by the puppy when he and Jerry look out from their shelter, but when Tom falls into the river, we cut back to Jerry and the puppy and the newspaper has disappeared.
Continuity mistake: When Sam is knocking on the door after losing the duel with Bugs, there is a doormat under his feet. But when Bugs (dressed as Emma) opens the door, the doormat has gone.
Continuity mistake: When Pluto is by the radio in the music shop, there is a record player behind him which has three buttons on the side, but in the next shot the buttons have moved a few inches to the right.
Continuity mistake: When Bugs Bunny is shot by Elmer Fudd, he collapses to the ground and you can see there is a green bush beside him, but when we see Bugs in the next shot, the bush has disappeared.
Continuity mistake: When Daffy and Mr Meek are having tea, Mr Meek shows Daffy the bump on his head and Daffy hits on the head to give him another bump. But when we see Mr Meek a few seconds later, the bumps on his head have disappeared.
Continuity mistake: The front door to Porky's house is coloured white, but when the door is opened in some shots, it changes to yellow.
Character mistake: When Cruise leaves to go deliver the package to the warehouse, Coupe says to Mr. V8, "Look at Cruise go. He'd make a great racer, wouldn't he?" Coupe is visibly looking annoyed when she is saying the line, as judged by the angry facial expression she is pulling, but there is no reason for he to be annoyed nor is she talking in an annoyed manner. (00:19:50)
Continuity mistake: When Tom (dressed as a seal) performs "Yankee Doodle" on the horns at the circus at the end of the cartoon, the background behind him changes between shots.
Continuity mistake: When Napoleon takes some snuff, he puts the box back on the map, but in the next shot the box is now on the table near Bugs.
Continuity mistake: When Bugs is square dancing with the hillbilly brothers in the hall, you can see that the hall has a decoration on the wall, but in the next shot the decoration has disappeared.
Continuity mistake: When Elmer opens the door and finds Bugs at the dressing table in ladies' underwear, you can see the door is positioned on the left hand side of the frame. But when we see Bugs, the door is now on the right hand side.
Continuity mistake: When Bugs leaves the bank after getting his carrot, you can see there is nothing on the wall next to the door. But when he says "Taxi!" in the next shot, a plaque saying "City Bank" appears from nowhere.
Continuity mistake: Knowing a security guard is about to eject him from an office building, Harold Lloyd grabs a secretary's pillow and flings it into the hallway. The pillow lands at an angle to the doorway, but when Lloyd is shoved out and lands on the pillow, the pillow is parallel to it.
Continuity mistake: When Stan pulls the door into Oliver's face, Oliver falls backwards and the spring on his back sends him skywards and onto the piano. When Oliver falls onto the piano, you can see that there is nothing on his stomach, but a few seconds later he is covered with piano hammers and other parts from the interior of a real piano.