Revealing mistake: In several shots when Babs is in the showers, the girl in the shower next to hers can be seen to be wearing a blue swimsuit. (01:15:10)
Factual error: Someone forgot to cover the air conditioners in the opening number of "Hello, Dolly!" which is set before the turn of the 20th century. (00:02:59)
Visible crew/equipment: When Neil and Brenda are in the row boat, the bulge of the mic transmitter is visible at Brenda's lower back. (00:43:45)