Factual error: Several union soldiers wading across the waist-deep river (and later climbing out of the river) are carrying the U.S. Springfield Rifle, Model 1903, which is a bolt-action, magazine-fed rifle (Note especially the soldier who climbs out of the river holding his rifle above his head.) instead of the historical accurate muzzle loading rifle. The Model 1903 was adopted by the US Army in 1903 and used in World Wars I and II, but not the American Civil War. For a picture of the Model 1903 Springfield Rifle, see: http://www.army.mil/cmh-pg/Museums/Showcase/Myer/Myer-4h.htm. (00:14:30)
Continuity mistake: Early on in the film Alec Guinness is travelling in the back of a van transporting gold bars to the bank. He spots what he believes is a suspicious car following and asks the driver to stop to check it out. The next shot shows the van stopping outside a row of buildings in a London street. The driver gets out to let Alec Guinness out of the van and they are now parked by a low wall with an open vista (probably one of the many bomb sites in London at the time) and no buildings.The next shot then shows the van outside the buildings again.
Continuity mistake: Near the end of the film, Karl Malden is embracing Vivien Leigh. In one shot she has her left forearm against his chest, with her hand in the vicinity of his shoulder. In the next shot this arm is instantly around his neck.
Continuity mistake: When Sylvester's owner tells him that she will get into the hotel, you can see that she is wearing a brooch on her shirt. But when she is carrying Sylvester around her neck in the next shot, the brooch has vanished.
Continuity mistake: When Jerry gets in Milo's car so that she can get cash to pay him for his paintings, they get into a dark green car. In the next shot they get out of a light (slightly greenish) blue car. (00:23:00)
Other mistake: In the opening titles, Irven Spence's first name is incorrectly credited as Irvin.
Factual error: At the end the narrator talks of "the Honourable" Winston Churchill. He was actually the Right Honourable.
Continuity mistake: When we see Nasty Canasta's drink, you can see there are holes on the counter next to the glass when the bartender puts two ice cubes in it. When Daffy Duck dares Nasty Canasta to drink it, the holes have disappeared.
Continuity mistake: When Bugs is making Francois look like a rabbit, he cuts up Francois' moustache to make whiskers. When Bugs says "You make a swell rabbit, Doc!" the whiskers disappear.
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 is at the medicine cabinet, he takes out a bottle of Seasick Remedy and starts drinking it. But when we see Tweety in the cabinet in the next shot, the Seasick Remedy bottle is still on the shelf when it should be in Sylvester's hand.
Factual error: When the Reindeer aircraft is on the ground at Gander, Jimmy Stewart pulls the landing gear handle, but only the left main gear folds up. All three landing gear (left, right, and nose) would have folded together.
Continuity mistake: When we see Junyer Bear sleeping in bed at the start of the cartoon, you can see he has "Junyer" written on the end of his bed, but when he is sitting up a couple of shots later, the word "Junyer" has disappeared.
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: 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 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: 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 Sylvester is angry that the blade of the axe flies through the mail slot, he strikes the can of tuna with the grip and in doing so crushes the can. When we see Sylvester setting up a piano a little later on, the can is undamaged.
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.
Continuity mistake: When Bugs Bunny puts down the bottles and sees the ants running off with his picnic food, you can see there are five brown bottles in the tub, but after a quick cut to the ants running away, we return to Bugs and the bottles have disappeared.