Fester and Gomez are standing on their heads and Gomez has a newspaper on the floor in front of him but when he rolls over to get up both the paper and Fester are gone. This is because the first part of the scene is reused footage from Fester's Punctured Romance (1964).
Gomez. Morticia and Sam are shown in a group shot and Gomez is filling the champagne glasses with smoking champagne. Sam is shown in a close up taking a sip but when they switch back to the group shot his glass is completely empty.
When Sam arrives at the Addams house, Wednesday is playing with her doll, sitting by the foot of the steps. in the next shot when she greets Picasso, she's on the grass beside the 2 graves.
During the fencing scene, Morticia's dress is missing her distinctive spider braids and her high heels are visible. This is because the footage used is an outtake from The Addams Family Tree (1964) with altered dialogue dubbed over the voice track. In the original version, her dress did have the spider braids.
When Sam arrives at the Addams home, a crew member's head is visible at the lower right of the screen.