Other mistake: A brief section of the film was flipped. One building has a sign saying "FIREARMS" and the lettering is in reverse.
Continuity mistake: When Sylvester discovers that the cupboard door has a lock on it at the end of the cartoon, he is holding a can opener in his right hand, but after we see a close-up of the lock, we return to Sylvester and the can opener has disappeared.
Continuity mistake: In the overheard view of the dog grooming the cat, you can see there is nothing beside them, but in the next shot a blue ribbon suddenly appears.
Continuity mistake: When Bugs Bunny is selling his box of cigars, the lid of the box is initially facing west when Yosemite Sam comes along, but a couple of shots later the lid is now facing north.
Continuity mistake: When we first see Bugs' home at the start of the cartoon, there is nothing around the hole. When the camera pans in on the hole, pieces of carrot have appeared.
Continuity mistake: At the beginning of the cartoon, Daffy uses fake footprints to lure Elmer to Bugs' home and you can see there are footprints outside the hole when Daffy walks off. But when Bugs emerges from the hole, the footprints have disappeared.
Continuity mistake: When we first see the cheese where Hubie and Bertie have been eating from, there are two holes and by the left hole there are pieces of cheese. When Hubie emerges from the hole, the pieces have disappeared.
Continuity mistake: When Sam takes out a burning log from the oven, you can see the right hand door is closed. When Sam tells Bugs to go into the oven, the door is now open.
Factual error: Actual showboats were very rarely self-propelled. The engine and boilers needed to propel the vessel would have taken up the space needed for the stage, backstage area, and auditorium. As a result, they had to be towed everywhere by a towboat.
Factual error: Sargent Nevins (Arthur Kennedy) is shown playing a pinball machine in the military rec room. When the camera turns to the play field of the machine, it is clear that this machine has flippers, and flipper buttons are visible on the side of the body. The movie takes place in 1943, but flippers didn't appear on pinball machines until 1947. (First machine to have flippers was Gottlieb's 'Humpty Dumpty.'. (00:37:30)
Continuity mistake: When Sylvester and the orange cat take Tweety Pie's nest, you can see the outside of the nest is covered in snow. But when the two cats reach the bottom of the pole, the snow has gone.
Continuity mistake: When Porky Pig arrives at the castle, he appears completely dry. But when he opens the door in the next shot, he is soaking wet, and when we see Porky a few shots later, he is dry again.
Continuity mistake: When the young man says "What's cooking?" to St. Peter at the beginning of the short, St. Peter is holding a feather in his right hand. In the next shot, the feather has disappeared.