Continuity mistake: In the first shot of Annie's body lying on the steps there's an orange chair on the porch pushed up under the window on the right. At first the top of the chair is below the bottom sill of the window but in the next shot it's been moved and the top of it is now above the sill. (01:30:20)????
Continuity mistake: In the beginning of the movie when Mitch catches the yellow bird under his hat take a good look at the injury (subungual hematoma) he has under his left thumb nail. It takes weeks for these to go away, but Mitch's is gone when we see his left thumb again as he holds Melanie in the kitchen. (01:02:15)????
Continuity mistake: The shadow of the statue on the right of the piano changes between shots. When we first see it in this scene the shadow falls right in the center of the picture of father then as they all sit waiting for the attack the shadow falls on the right side of the picture. (01:40:25)????
Continuity mistake: As Melanie sooths Kathy she has a towel in her right hand that she drops on the green pillow to the left of the couch. We catch a glimpse of it lying there as Mitch runs to put wood in the fireplace. Melanie never touches the towel again but the next time we see it it's in the middle of the couch. (01:40:50)????