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.
Continuity mistake: When Hassan is trying to remember the magic word to open the cave door, you can see there is a burrow tunnelling under the entrance, but when we return to Hassan trying to remember the word later on, the burrow has disappeared.
Continuity mistake: When Sylvester is unable to sleep at night, the camera pans in on his eyes and you can see that he has his head on the pillow when this happens, but in the next shot he is lying flat out on the bed.
Continuity mistake: The flowers Sgt. Killian places in his helmet's netting change from fresh to wilted several times as the scenes change.
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: When Yosemite Sam says "I dares" to Bugs, you can see there is nothing behind Bugs, but in the next shot he is standing in front of a mountain.
Continuity mistake: When Jerry shows Spike the photo of Tom being kicked out of the house, Spike is seen holding it with both hands, but when we the photo in the next shot, there is now only one hand on it.
Continuity mistake: When the Three Little Bops are performing at the Dew Drop Inn, you can see there is a double bass behind the pigs when they are playing, but when the camera cuts to the piano player, the double bass has disappeared.
Continuity mistake: When Ned and Ralph are at the clockwork toy, the toy has a lever on its side. But when the toy comes to the cat, the lever is missing.
Continuity mistake: When Elmer says "That was the wabbit!" he picks up the spear in his right hand. But when he is chasing Bugs, he is holding the spear in his left hand, and when he sees Bugs on the horse, the spear is back in his right again.