Continuity mistake: In the scene where Wiggy is looking at John Forsythe's new painting at the cider stand before she goes inside to put up his shopping order, the new painting is also on display inside the store, on the floor behind John Forsythe. (00:16:30 - 00:19:30)
Continuity mistake: Right at the end, Shirley MacLaine's dress has a large spot that disappears in the following shot.
Continuity mistake: In the porch scene with the little boy, keep an eye on the rabbit. It moves around on John Forsythe's lap between cuts, even though it's supposed to be dead.
Factual error: The landscape shows late fall, with color and fading leaves. But on the bushes near the killer porch when Captain arrives for muffins are full of spring bloom Azaleas.