At the 7:33 minute mark as Kay and June read the note left by Kenneth Van Dusen the close-up of hands holding the note have dark nail polish, whereas both Glenda Farrell and Mary Brian appear to be wearing light-colored or clear polish.
During the car chase scene, shots alternate between blonde Glenda Farrell driving the car and a dark-haired stunt driver.
The car Gibson wrecks is not the same car he had been driving previously. There are several minor differences in the car let go over the side of the road.
When the newspaper story of a couple's engagement is shown, the first several lines give the usual facts, but then there are two lines that don't make sense about a telephone book and then a music review beginning "The adagio air for violoncello."
When Gibson and his new bride are driving away from Palm Beach, Florida, they are driving through arid, desert-like terrain with mountains in the background - features not found in Florida.
At the 31:37 minute mark the boom mic shadow can be seen move across Helen Ware's (Mrs. Bradford) head.