Continuity mistake: When the pig holding a guitar says "We've heard the most", you can see there is a saxophone behind him. The saxophone disappears in the next shot.
Continuity mistake: When Ralph is walking up the steps to his apartment, he has a present in his right hand. The present disappears when he goes through the doors, but re-appears when he enters the kitchen.
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: The helmet on the sleeping soldier moves from partially covering his face to covering it entirely just before Sergeant Lewis shakes him.
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: 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 Daffy arrives at the theatre, there is a billboard behind him saying "Bijou Presents on Stage Tonight." But he points to the marquee in the next shot, the words have disappeared.
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.