Other mistake: Mick the orderly is Irish throughout the film, but when Nurse Dawson bumps into him and says, "You clumsy oaf," Mick's reply, "Look who's talking," is said in a London accent.
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.
Other mistake: Close to when Tony Curtis and the nurse are going back to the pink sub, there is one scene where in the far background there are two objects moving on the water each creating a wake. It looks like someone is water skiing. A DVD will likely show this clearer.
Other mistake: If it was a party line why did Tony Randall get a busy signal when he was calling Doris Day from Rock Hudson's apartment?
Suggested correction: Dialing the number from a party line would get you a busy signal. If you wish to dial the other party you would dial a special code. In the movie it is 793.