Continuity mistake: It is supposed to be night when Joe slips out of the hotel, but a daytime sky is visible.
Continuity mistake: At night, on the train, Sugar gets the curtains stuck between the ladder and the side of the berth. In the next shot she opens the curtains while standing on the ladder and without moving it. (00:36:05)
Continuity mistake: When Tony Curtis & Marilyn are on their way to the yacht, Marilyn has what appears to be a clear 'bra-band' across the back of her gown - this band appears and disappears until they are finally settled in the room.
Continuity mistake: This takes place in the scene where Tony Curtis and Jack Lemmon first meet Marilyn Monroe on the train. Throughout the scene you can see Marilyn Monroe's black bra straps appear and disappear. It happens once on her right shoulder and once on her left shoulder. (00:28:00)
Continuity mistake: In Florida, Josephine and Daphne are assigned to room 413, but from then on their room number switches back and forth between 413 and 415.
Factual error: In the shot where the female band members run from their hotel (in Florida) to the beach, mountains can be seen in the background.
Revealing mistake: When Spats Columbo's gangsters are being searched for weapons at the Florida Hotel, the man doing the pat search can be seen placing the gun behind the gangster's leg, just before it supposedly drops out of his trouser leg.
Other mistake: When Sugar and Josephine are talking on the telephone, Sugar's eyes are moving backwards and forwards, obviously reading from a cue-card.
Continuity mistake: In the scene on the train when Sugar climbs into 7A with "Josephine" she hides from Sue who is going to the bathroom. The girls come in and start a party. When it spills over into the walkway and "Daphne" pulls the brake cord, Sue jumps up from her bunk. She never came back through the hallway from the bathroom or she would have seen all the girls coming to the party.
Other mistake: In the opening chase-scene when the whisky-filled coffin is hit by bullets, whisky flows out of holes even above the liquid-level. (00:02:50)
Continuity mistake: In the chase scene in Florida, Joe and Jerry escape the gangsters at one point by running up to their rooms, changing into their Josephine and Daphne costumes and then coming back to the elevator. The problem is that the two reside on the 4th floor in Room 413 and the elevator shows that they came down from the 3rd floor.
Factual error: The head gangster at the convention is wearing a 1950s-era hearing aid around his neck. They didn't have anything that small in 1929.
Revealing mistake: When Joe and Gerald escape down the balconies you can see that the view of the ocean is painted, specifically the waves don't move.
Other mistake: In at least two scenes, when they are checking in to the hotel in Florida, and later when the "girls" are trying to escape, the "bull fiddle" is much smaller, the size of a cello instead of a bass violin. A bass violin is a very large instrument, and wouldn't it have been funnier to have "Daphne" carrying a case the true size of a bass violin?
Chosen answer: I've seen it colorized several times on TNT and FMC.
Grumpy Scot