Character mistake: During the dancing girl scene, as they are singing the praises of Kane, the girl to the immediate right sings out of time with the rest of the dancers during the line "His favorite son." Even though she forgets to sing the line, she can be heard singing it a bit too late. (00:41:00)
Revealing mistake: When the elephants are making fun of Dumbo in the train caboose, Dumbo's mother pulls a pin which causes the stall door above the other elephants to fall. When the door bounces back up, you can see that the animators forgot to draw the elephants' heads and trunks and only their bodies are visible.
Visible crew/equipment: After the ship's captain delivers the Falcon to Sam Spade's office, he collapses on the leather sofa in the foreground. Just after Spade's secretary says, "Is he ...?", the shadow of someone's head passes over the sofa.
Revealing mistake: When the notice of impending strike is posted in the town, the American spelling of "labor" is used. A Welsh signwriter would have spelt it "labour."
Continuity mistake: When Larry is taken home after being bitten by the werewolf, the door opens and Larry is seen staggering in. In the next shot, the door is seen opening again.
Continuity mistake: When Lou is finally convinced that he won't get hurt being the umpire in the "Hit The Umpire" game, he runs to take his place then stops in front of the batter. As Lou runs to take his place he isn't wearing a baseball cap, nor is he holding one in his hands, but in the next shot, when he gets hit in the head by the batter, one has mysteriously appeared on his head.
Continuity mistake: When Dorothy Lamour gets out of the water and confronts Bing Crosby and Bob Hope, she's supposedly naked and covering herself with leaves. But you can see the flesh colored bathing suit she's wearing bunch up at the hips while she moves. (01:10:22)
Continuity mistake: When Jerry appears from the hair of the toy lion, you can see that behind him there is a decoration and some purple baubles. In the next shot, the decoration has disappeared and the baubles are now much closer to the lion.
Continuity mistake: Regina enters the house and places her umbrella in the corner. As she speaks to her husband, she first removes her right glove then her left. In the next shot, she turns toward the camera and removes her left glove again. (01:27:05)
Visible crew/equipment: When Bob Hope and Lynne Overman are running through the artillery range the second time they fall you can see lights reflected off Bob's helmet as he is getting up.
Continuity mistake: When we see from Tom's view the fridge he is going to crash into, you can see the cheese is on the second shelf, but when he crashes into the fridge, it has moved to the top shelf.
Continuity mistake: When Donald uses the jack to raise the hut onto his van, you can see the glass in the window is completely intact, but when he burrows under the hut a few shots later, the glass is now broken.
Continuity mistake: When Donald has his head stuck in the bowl of food mixture, you can see that the waffle maker has nothing on the bottom plate, but when Donald gets his tail grilled by the machine, another handle has appeared.
Continuity mistake: Higgins hands mister J.P. Merrick the card from the Personnel head of the department store. Charles Coburn is holding it with both hands, which in close-up becomes just the right hand. (00:07:00)
Audio problem: After Moose Matson is shot in the cop and car chase, Moose Matson, says, "Pull over, will ya?," but his mouth isn't moving.
Factual error: Abbott and Costello have inadvertently enlisted in the Army but anyone weighing 240 pounds or more will be rejected. When Costello steps on the scale, the Army physician tells him, "You're in the Army. You made it by two ounces." Medical scales at that time (1941) showed weight in whole pounds only and did not show ounces.
Continuity mistake: When Sandy is watching the chef toss hot cakes at the American Grill at the start of the cartoon, you can see there is a jug and some dishes at the far end of the counter, but when the camera pans in on the chef, the jug and dishes are now much closer to him.
Continuity mistake: Johnnie, Lina and Beaky are playing anagrams. Lina spells out the word MURDER with an M as the first letter. The shot cuts away and then back again, and now the first letter is an inverted W. (01:01:40)
Continuity mistake: When Bugs puts up a "Camp Here" sign near his hole, you can see there is nothing behind the sign, but in the next shot a tree has suddenly appeared.
Audio problem: Right at the beginning, a man is using a horse to plough a field, and behind him is a little girl, who finds an old doll that has been churned up by the plough. The little girl says,"Grandpa, look what I found." Grandpa and the horse stop working, but then he says, "Whoa, Nellie," to the horse, which has already been stopped for a while. (00:01:50)