Continuity mistake: After their first number, Ted and Jim are in their dressing room, Jim is buttoning his left cuff and then pulls down his right sleeve. In the next shot, he does this again.
Factual error: This relates to the first movie with this title, the one with Jack Benny in it. About midway in the film there is a scene with Polish pilots in the RAF in a room. It cuts to a brief shot of airplanes flying which obviously purports to show the Polish pilots flying their airplanes. But, the airplanes shown are circa 1935 U. S. Army Air Corps Consolidated two place fighters, never used by the RAF and in fact totally obsolete and never used by any air force during WWII.
Continuity mistake: When Abbott and Costello are on the train. Costello walks over to see the guys playing poker. In the background a man closes the back door of the train. As Costello passes you see the door is open again and the same guy closes it again. (00:17:10)
Continuity mistake: When Spencer Tracy takes Katharine Hepburn to the baseball game (about 20 minutes into the film), several plays supposedly from that game are shown. Some of the plays take place on a diamond that has a well manicured dirt path from the pitchers mound to home plate, while others take place on a diamond with an all grass infield and no path.
Factual error: Orville says that he born on September 13, 1913, a Friday. That was actually a Saturday. (00:46:10)
Visible crew/equipment: In the final musical number "Strictly off the Record", you can clearly see the shadow of the microphone boom during part of the number.
Continuity mistake: When Donald is playing "Pin the Tail on the Aeroplane", he has nothing in his hand when he comes out a door and turns the corner, but in the next shot he is now holding the tail.
Continuity mistake: When Jerry runs onto the record player, he runs next to a button panel and there are four buttons on it: Fast, Stop, Start and Change. But when he is pressing random buttons later on in the cartoon, a "Record" button has been added and the "Change" button has disappeared.
Continuity mistake: When Daffy sees Dr Jerkyl's house, he is holding a telegram in his hand that disappears when we see him in the next shot.
Factual error: Those in America, mainly in Massachusetts, weren't burned at the stake when accused of witchcraft. They were hanged. It was those in Europe who were burned at the stake.
Continuity mistake: When Donald tears the brim off his army hat with the bayonet of his rifle, the size of the torn off brim goes from small to large between shots.
Continuity mistake: When Bugs emerges from his hole with a cow skull on his head, he walks over to Elmer and you can see he is holding a carrot in his right hand. In the next shot, the carrot has disappeared, and in the shot after that, it is back again.
Continuity mistake: When Daffy is preparing a sandwich on the table, he spreads mustard onto Porky's arm, but when Porky chases after Daffy, the mustard has disappeared.
Continuity mistake: When Bugs puts a cigar in Ala Bahma's mouth at the end of the cartoon, the background is blue with a pink curtain, but after the cigar explodes, the background is green and the curtain is blue.
Audio problem: When we see the moth singing on his way to the bar, his mouth doesn't move.