Goofs

When Mr. Folger looks through his binoculars at the twins in their storm-tossed sailboat, the view is one of fair weather.

(at around 26 mins) Kate walks over to the bed and takes off her shoes and socks. Her leg lifts up twice in a row.

(at around 25 mins) Admittedly, the special effects/trick photography are superb, especially for its time, but there is a moment just after Kate hands Pat a lit match, when Kate turns transparent. It's when she's behind the chair Pat is sitting in and moves to the right. As she starts her move, her waist becomes transparent for just a split-second, and the bed can be seen behind her through her hip and waist area.

Nighttime scenes were filmed using a filter to darken scenes, but this technique leaves the sky light, when, in fact, the night sky should be dark. Further distance and detail is evident, when it should fade and disappear into the shadows and darkness of the background.

When Katie and Pat are talking in the bedroom after the barn dance, Pat tells her that Bill said she's "swell and they had a lot of fun together". Katie walks away from her, and, in that shot only, it's obvious by Pat's face that it's a stand-in and not Bette Davis herself.

During the storm on the boat with Kate and Pat, the sail is briefly visible in the shot. The sail shows a CF registry number, which is a California registry, while this story takes place in northeastern United States.