The long shot of the ship is reversed, making the lettering on the name read backwards.
When Borscht is eating a metal disk, thinking it is a piece of salami, he suddenly has another one in his hand, in the next shot.
When Larry reaches over to get the pepper shaker, the camera cuts to Moe, who already has it in his hand.
When the mud splashes into Shemp's face, you can see some of the mud splatter into the "sky", meaning it is a fake background.
When the Stooges try to pull the door open, Shemp accidentally cuts his hand on the lock and he can be seen in pain and looking down at his hand.
Shemp accidentally steps over Borscht's dialogue by saying "Here's how!" when they are having a toast.
Shemp accidentally steps over Moe's line "No wonder Borscht acted so mysterious.", so he stops talking until he is done.
Moe and Larry are supposed to say "What a rest!", but Larry says "What a nice sleep!" instead.
When Shemp says the line "Suckers! Let them sleep on hard boxes!", his mouth is not moving.