Continuity mistake: When Bruno goes to the Captain, to ask for leave so he can go to his daughter's funeral, he places his cap on the desk in front of him. It slips to the floor, but a minute later his cap is magically back on the desk.
Factual error: The radio Walter uses on the island has no apparent power source; we never see either batteries or a hand-cranked generator.
Continuity mistake: When Shirley Maclaine goes swimming in the blue lagoon, her hair is all wet before she enters the cave, but once in the cave her hair is only wet on the ends.