Towards the end of the movie when Caroline arrives back at the girls' apartment and finds the sack that Gregg left on the floor, she sits down and starts going through the items inside. She pulls out a handful of stuff which includes scraps of paper. In the closeup shot of her hand the paper scraps have gone and she is just holding some makeup.
When Hope Lange returns with Stephen Boyd to his apartment, they sit on the couch and their shoulders are about a foot apart. When the camera cuts to a closer shot, their shoulders are touching. There was no opportunity to move closer with the quick cut.
In the scene when Diane Baker tells Hope Lange "he's ten foot tall to me" while walking down the street, several people... two men and two young boys... look into the camera, smiling (they were obviously filming with a camera hidden in a car during these scenes as those people weren't extras).
When April is in Dexter's apartment, the New York City skyline is seen in the background. However, it is clear this is a backdrop and only two lights are seen to flicker throughout the whole skyline.
At the start of the movie when Caroline is taking the typing test for Mary Agnes, when Mary Agnes says "time's up" Caroline pulls the paper straight from the back of the typewriter. The paper was not wound around the typewriter drum but was just sitting in the back feed roller.
Near the end of the film when Caroline meets Eddie again, she turns toward him and says, "Eddie, I thought I was free of you," yet her mouth does not say all these words. Later, when she tells him "I was wrong to try to break up your marriage", her mouth is not saying anything.
A huge palm tree is visible during a company picnic supposedly set on an estate near New York City - a botanical impossibility.
When Hope Lange is on her way out of the office, she goes back to answer her telephone. She says "Hello" when she picks up the phone, but doesn't push the button to connect to the correct phone line until a split second after she answers. The caller wouldn't have heard her answer.
When the Joan Crawford character is on the phone speaking to her boyfriend, she comments on his "rabbit-face wife". Yet later in the film, she refers to the same man as a widower.