In the restaurant scene, Alice and Ted each start eating dessert. In the next scene, it is served to them.
When the 4 of them are together after the party, Bob puts on a record, but later the music is still audibly playing but in the background you can see the record player and it does not have a record playing.
In the restaurant kitchen, Carol takes hold of the waiter's left hand. In the next shot, she is holding his right hand.
In Alice's scene with the psychiatrist, the large ashtray on the couch moves from her right to her left and back again.
In the psychiatrist scene, Alice is sitting directly across from the shrink. But in her close-ups, her chin is raised and she is obviously talking "up" to the camera.
Camera crew's reflection visible during the opening helicopter shots.
When Ted is in the pool talking to Bob, he says "I called home to make sure the kids were okay," using the plural "kids" - but they only have one child.