Continuity mistake: The handle that Bugs uses to try to escape was originally not on the door which the scientist locked up when Bugs entered the castle.
Continuity mistake: Johnny and Toby are heading to a frog pond. Johnny stops by a fence and considers taking a shortcut through the pasture until Toby warns him of the bull in the pasture. When the two boys turn around, the fence is suddenly several feet away.
Continuity mistake: When Bugs drills a hole in the hotel floorboard, he puts on a nightcap and descends into the hole. But when he emerges from the hole a little later on, he is now wearing a nightshirt.
Revealing mistake: Just before she KOs the lecherous producer, Peggy Harper gives him a big stomp on his right foot. Or that's what it was supposed to look like because the adorable Betty Hutton just slams her foot on the floor at a very safe distance from Howard Freeman's. (00:24:15)
Continuity mistake: Elmer Fudd is wearing his bowler hat when he is making a potion for the bear to drink, but when he takes the potion to the bear, his hat has gone.
Revealing mistake: When Sylvester is on the run from Porky, he dives under the bed, but the cels of him diving were placed over the bed, so that he appears to dive on top of the bed and disappear.
Continuity mistake: When Daffy steps out of the bus at the beginning of the short, he drops his suitcase on the pavement. When we see Daffy in the next shot, the suitcase has gone.
Continuity mistake: When the state trooper examines the letter, the is no stamp. However, when Charlie Chan (Sydney Toler) examines the letter, there is a stamp present. (00:43:10)
Continuity mistake: During the Benny Goodman "All The Cats Join In" segment, a teenaged girl gets out of the shower and hops into her underpants and skirt. Suddenly her feet are clad in white socks which were not there before.
Continuity mistake: When Tom picks up a telephone book, you can see he is holding the book with both hands, but when we see a close-up of the "Ajax Mouse Exterminators" in the next shot, his hands are nowhere to be seen.
Factual error: When the camera pans to the theatre right after the opening credits, the sign uses the British spelling of "theatre" instead of the American "theater."
Audio problem: When Bugs says "That's the old ginger, boy!" when practising with his baseball bat, his mouth doesn't move.