Continuity mistake: As Lulu’s shoulder angle tells her that she will turn into a mule if she doesn't go to school, the shading on Lulu’s chin suddenly changes and gets darker, like a shadow just appeared from nowhere. (00:02:55)
Continuity mistake: When Jerry opens the door of the refrigerator, there is a piece of corn on the cob on a plate and next to it is a bowl of eggs. In the next shot, the eggs have become fruit.
Other mistake: When Daffy is helping the guest to his room, he looks at his keys as to which one would open it. When he finds the right key, he somehow manages to open the door without unlocking it.
Continuity mistake: When Tom is tip-toeing past the gate at the start of the cartoon, Spike is sleeping and you can see there is nothing around his neck, but in the next shot a dog collar has suddenly appeared.
Continuity mistake: When Jerry replaces two keys on the piano with a mousetrap, Tom gets his finger caught and there is a catch lever at the bottom of the trap. But in the next shot when Tom pulls up the mousetrap and his finger expands, the catch lever has disappeared.
Continuity mistake: When Humphrey Bogart comes into the kitchen after being hit in the face by a coconut custard pie, the number of cream spots on his dinner jacket changes between shots.
Continuity mistake: When Butch points his pistol at Tom, you can see that the handle has nothing written on it, but in the next shot the words "Ajax" have appeared.
Continuity mistake: When Tom is about to drop the iron on Jerry, he is holding some cheese on a piece of string in his left hand. When the iron drops on Tom's foot, he is no longer holding the string.
Continuity mistake: When the cat places the tiny canary on to the plate, the salt and pepper pots on the table change positions between shots, and the cabinets in the background disappear. He also has a knife and fork in his hands, but after the canary says he's been sick, we return to the cat and the knife and fork have disappeared.
Continuity mistake: When we see a man and woman sitting by a lake, the plate of pancakes on the picnic blanket moves from the left to the right between shots.
Continuity mistake: When the delivery man gives Cecil Turtle a gift while he is resting on the beach, there is a pink ribbon on the side of the box that disappears in the very next shot.
Audio problem: When Bugs says to the kid, "Cut it out, kid! Somebody will get hurt!", his mouth doesn't move.
Character mistake: When we see the sign in the window of the music shop, it reads "This Week Dance Record" which doesn't make much sense. Surely it was meant to read "This Week's Dance Record."
Continuity mistake: When the mouse lands in the lion's stomach, he falls between two bones. In the next shot, the bones are now in front of the mouse.
Continuity mistake: When Mickey Mouse is in the bathroom, he tells Pluto to put his shoes on the bed. But when Pluto comes out of the closet with Mickey's shirt and trousers, he slides under the bed and the shoes are nowhere to be seen.
Continuity mistake: Throughout the cartoon, look out for the swing inside Tweety's cage. In some shots, it is in the cage, in others, it isn't.
Continuity mistake: When Jerry produces a bucket of sand, he is not wearing his red swimming trunks, but when he replaces the sugar bowl with the bucket, he is wearing them again.
Continuity mistake: When the dogs run away from the Mexican hairless dog after thinking she's a skunk, the Mexican dog's ears are pointing up but in the next shot they are pointing down.