During the car chase scene, Gloria is wearing tan leather gloves while driving, as visible in many facing shots. However, when there is a switch to a shot of her car's speedometer, the hand holding the steering wheel has no glove.
When Gloria writes "No Sale" on the mirror with her lipstick, the "o" in "No" is not connected at the top, but when Liggett looks at the mirror when he returns to his apartment, the "o" in "No" is connected differently; it appears that the words were rewritten on the mirror.
During the car chase, there are cars driving behind Liggett, visible through the rear window from inside the car. When the shot changes to a view of both cars on the highway, there is no one behind him.
During the car chase, the license plate on Gloria's car appears above and below the rear bumper, and the chrome emblems on the front fenders appear and disappear.
When Gloria and Liggett are in the luncheonette; one of the background actors is taking off his overcoat and preparing to sit down at the counter. However, in the next immediate shot, the same actor is putting on his overcoat and starts to leave.
When Gloria and Liggett are on the boat; she recites a poem and then Liggett states the title of it as The Owl and the Cat. However, Gloria gets the last line wrong. She says, To The Land of The Bong-Trees when the correct phrase is To The Land Where The Bong-Trees Grows. Liggett also makes a mistake; the correct title of the poem is The Owl And The Pussycat.
As the film opens Gloria is in bed and the phone is off the hook. She never hangs it up, yet is able to use the extension in another room. Phones don't work if any receiver is off the hook.
When Gloria dials Norma's number and then hands the phone to Steve, she dials only six digits. Cities had seven-digit phone numbers a long time before the time of this film, and earlier at Liggett's place she correctly dials seven digits.
Gloria drives her spike heel into the top of Weston's shoe/foot, pressing harder a number of times. Yet, Weston shows no sign of the ordeal, walking apparently pain-free and with no limp afterwards.
When Gloria is pulled over for speeding, both the right side of her car and the right side of the police car are lit up with a flashing red light - when the only source of said light is on top of the police car.
A crew member's arm is visible in the mirror when Liggett stands before it and is supposedly alone.
When Liggett is trap shooting with his wife Emily, it is evident that she is unfamiliar with loading a shotgun. Emily can be seen loading a shotgun shell into the chamber of a Remington shot gun with the brass forward, opposite from the way a shotgun shell is loaded; i.e., backwards.
When Gloria meets Liggett in the bar, a couple is being shown to their table. However, in the next cut, the man stops in between them looking confused. It then appears via his reactions that someone signaled him to keep moving.
In the penultimate shot, one of Emily's false eyelashes appears to be half-detached.