Continuity mistake: When Elmer is stabbing Bugs' hole with his spear, there are rabbit tracks around the hole. But when Elmer says "I'm going to kill the wabbit!" the rabbit tracks have disappeared.
Continuity mistake: When Travis finds Arliss and Old Yeller in the drinking water, he throws a rock at Old Yeller. Old Yeller is wet all over. Arliss then throws a rock back at Travis, and a chase ensues. After their mother breaks up the fight, she admonishes Travis. Travis then says something to Old Yeller. Old Yeller is lying on the ground dry as he can be. He was just in the water a little over a minute ago, yet there is no sign of wetness at all in his fur. (00:15:45 - 00:17:11)
Continuity mistake: The Sergeant (played by Karl Malden) is on leave with his family when the car needs water. His daughter (played by Natalie Wood) gets out and refills the water. During the conversation, Malden is bare headed, then immediately after he has a hat on.
Continuity mistake: When George is at the fridge and finds the chicken has been eaten, the door is open. But in a close-up of Tom in the next shot, the door is now closed, and in the shot after that, the door is open again.
Continuity mistake: The character Sid Sorokin sings the song "Hey There" into a dictograph machine. He then plays it back and sings a "duet" with himself. However, the lyrics and melody at the end of the song are different from what he sang into the machine originally.
Continuity mistake: When the three little pigs hear the Big Bad Wolf playing his trombone in hell, the drumming pig only has a drum but when the wolf emerges from hell, a cymbal has appeared.
Continuity mistake: When Ralph is ready to surprise Alice, there is a switch by the door. But when Ralph tells Ned to bring in the cake, the switch has gone.
Continuity mistake: When Daffy performs his time-step, there is a button on his waistcoat. But when he goes down on his knees, the button is missing.
Continuity mistake: When Bugs is trussed like a roast pig, the Tasmanian Devil puts salt and pepper on him and he leaves the salt shaker on the tree stump next to Bugs. But when the Devil unties Bugs later on, the salt shaker has disappeared.
Continuity mistake: Sylvester puts a large wedge of cheese on the ground to lure Speedy out of his hole. But when Speedy takes the cheese, it has changed to a small, thin slice.
Continuity mistake: When the Tasmanian Devil passes by the hamburger stall, you can see there is nothing next to the radio on the counter, but when we see a close-up of the radio in the next shot, there is now a mustard pot and a bottle next to it.
Continuity mistake: Early in the film, Henry Fonda and another juror are in the men's room. When the other juror exits, the door is a swinging door. From the jury room the door is a regular door with a door knob. You can hear the door close when Henry Fonda exits and closes the door.
Continuity mistake: When Quackie is at the cafe with Mary, their dog is sitting on the chair between them at the table. But when Inspector Faraway appears, the dog has gone.