When the inspector, Hopkins, and Pettijohn are looking at the wardrobe of the murdered man, in the closeup Hopkins has his arms crossed. In the long shots, his arms are down by his side.
When Rita Warren (Brenda Marshall) is practicing her strip routine in front of the mirror, she drops a shoulder wrap to the floor. After the butler comes in, the the wrap is gone in the long shots.
On the label for the Novocain at the dentist's office, epinephrine is misspelled 'epinephin'.
The shadow of the boom mike is visible when Francis and his wife are in front of their closet when he tries to get her to leave before the police arrive.