The golf bag moves from the left to the right of the chair when Millie tells Larry to leave her apartment.
When Shemp models his underwear for Belle, a newspaper magically appears in her hands before she answers the door.
Larry and Shemp can be seen moving slightly so Cedric the clam can aim at the latter's face correctly.
When Belle is seen pulling the Christmas lights out of Moe's mouth, it is clear that they're coming out from the other side of his head.
A strand of Shemp's fake Santa beard gets caught in the fireplace bellows and he has to puff it out.
The sound effect for the stomach punch Larry offers Moe is not heard.