Continuity mistake: The windowpane that is broken by the thief is in a door that desperately needs a good paint job. It's the door that leads outside and to a small room full of plants, a veranda of sorts. But when Laura looks at the door, she's looking at the inner door, which looks like it has just been painted, and, in the morning, the broken pane is covered up by a piece of wood, but, again, it's the inner door, which is totally wrong. It's the outer door's window pane that was broken.
Continuity mistake: Near the end, Rosemary has a photo in her right hand. When Dr Fairborne starts to get aggressive, at first, Rosemary tries to keep the photo away from him, but when he grabs her and threatens her with a scythe on her neck, the photo has vanished.