At 01:06:00 in the close-up of Maisie's hand holding a contract, the nails have on dark nail polish, but Ann Sothern is wearing light-colored or no nail polish.
At the pistol range, on the rear-projection behind Maisie and Chip, the same shot of two policemen walking side-by-side in the door, then a man in a suit and hat walking out of the door, is used twice.
When Mrs. Lorrison pulls away from the rural gas station, the camera and crew are briefly visible in refection on the side of her car.
While driving from LA to Long Beach, Guy says a right turn would take them to San Bernardino, many miles east of LA -- which would require a left turn.