Continuity mistake: When Bugs is turning the pages of his piano book, he sees a woman in a bikini and then carries on turning until he gets to the right page. When he gets to the right page, the style of the notes changes between shots.
Continuity mistake: When Screwy Squirrel is breaking the walnuts by putting on his head and hitting them with a hammer, he puts down the hammer to eat the walnuts, but when the pet shop owner takes Screwy out of his cage, the hammer has disappeared.
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.