Captain Mullin's badge on his chest suddenly disappears when he sits down in the diner.
The time of the armored car robbery was 9:30, according to the clock in the police car that receives the call reporting the crime, but when questioning Shemp at the police station later, the Police Captain demands to know what he was doing at 11:00.
The small block of dry ice, to pretend the soup is hot, is visible on Moe's back when the bowl of soup hits him.
When Captain Mullins takes the spoon out of the cup of paint, there is none to be seen on it, meaning the cup was actually empty.
Shemp actually chokes on his food when Moe slaps him when accusing him of stealing his cracker.
Kenneth McDonald almost trips over the carpet when he and his partner are chasing Moe and Larry.
When Angel swings his machete at Shemp and hits the door frame, a mark is already there from a previous take in which he hit the frame with the machete.
When Shemp hits the crooks with the wooden barrels, Gladys can be seen hiding behind a wooden crate. However she was previously tied up and gagged in a chair but no one is seen freeing her.
Lefty Loomis is actually right handed.