During "everybody is getting sea-sick" scene Ogden, Natascha and Harvey push an ashtray around the table until Ogden angrily swipes it off the table. Shortly after it's back on the table in front of Natascha's chair and in the next shot it moves over to be in front of Ogden's chair, although nobody is at the table at that time.
When Natascha is wearing the yellow pajamas, a black bra can be seen underneath, despite Natascha not having worn one with her evening dress.
Natasha's hair while standing on the railing ready to take a plunge off the boat that docked at the Hawai harbor changes from being blown by the wind to a neat hairdo with every lock in place.
Toward the end of the film Ogden, Natascha, Harvey and Martha sit around a restaurant table. Ogden and Natascha sit with their backs to the camera and very far from each other so they won't obscure Harvey and Martha at the other side of the table. When they get up to dance, the camera cuts to a close up of Ogden and Natascha which are suddenly almost touching shoulders.
Sophia Loren starts a scene in Marlon Brando's stateroom wearing high heels but walks out at its conclusion in flats.
The red shoes of Sophia Loren (who is supposed to be on board of the ship with just one pair) change from being ballerina flats to high heels.