Continuity mistake: When Pluto slides on the floor after coming out of the closet, he goes under the bed and Mickey's shirt, trousers and top hat fall onto it. But when Mickey comes out of the bathroom and slips on the soap, the hat is now on the shirt and a pair of shoes have appeared out of nowhere.
Continuity mistake: As Johnny is at the window taking to Maura she invites him in the door. He turns towards the door and it opens. Then the camera angle changes, the door is closed, and opens again. (00:17:00 - 00:18:00)
Continuity mistake: When Thomas attempts to get back in the house by the chimney, you can see there are two logs in the fireplace. But when Tweety brings more logs over to the fireplace, the two logs that were there originally have gone.
Continuity mistake: Bongo the bear, riding in a car of the circus train, looks out the window. There are four vertical bars on the window - but when seen from outside the train, it has six bars.
Continuity mistake: Mrs. Kraft is playing cards with the bellboy, resting her feet on the shelf under the table. She drops her cards on the floor, and when she gets down on the floor to pick up the cards a large cushion has appeared on the shelf where only a moment ago her feet were resting. (01:00:00)
Other mistake: After the fade out, the "The End" board shows it as an "MGM Tom and Jerry Cartoon." The two stars were not in this short at all.
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 Jerry first becomes buff after drinking some of the milk and starts approaching Tom to beat him up, Tom sees a book and grabs it then hits Jerry. Before Tom grabs the book, it's yellow. When he grabs it, it's green.
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.
Plot hole: Early in the movie, when Joe Stefanos tells Mary, the owner of the luncheonette, that he found Jeff Bailey by passing by and seeing the name on the sign of the gas station, it makes no sense. He only knew him by the name Jeff Markham. Even if he was just lying to her, he uses the same explanation when he is alone talking to Jeff. We never know how he found him.
Suggested correction: He told Jeff that he saw him pumping gas at the station.
Factual error: After the credits, at the beginning it shows "New York 1883" but in an early scene when Powell is reading the newspaper in his study he is complaining about the Mayor of New York whom he calls "Honest Hugh Grant." Hugh J. Grant did not become mayor until 1889.
Continuity mistake: When Tom realises he is drinking sea water in the bucket Jerry gave him, he drops the bucket on the towel, but when he spits the water in the girl cat's face, the bucket is nowhere to be seen.
Continuity mistake: In the scene where Jeb shoots Prentice, we see Prentice with his right hand covering the wound just below the right rib cage. When Jeb carries him inside, Prentice's right hand is now covering the left side rib cage. (01:05:55 - 01:06:35)
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 Robert Taylor escapes from the asylum, and is driving the second car he steals, the car is shown at least once with windshield wipers pivoting from above the windshield, then shown with the wipers pivoting from below the windshield. Clearly, these are two different cars. I think the studio borrowed wiper footage from the scene in which he is driving the first stolen car, to use at moments in the scene in which he is driving in the second car.
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: Pearl is singing a song to mock her boss at the factory. She goes through the first lines about being too worn out "to play." With her feet on the work table, she puts her hand under her chin. In the background, a fellow seamstress is watching. In the next shot, her arms changed position, now crossed in contrast to the previous shot. (00:04:40)