Continuity mistake: When the girls are in Sam's grandma's attic, Roberta finds a scrap book and says to Sam "Sam I think I found something," and Sam comes and sits next to her. In the wideshot you can see the page they're on has just one large newspaper article glued onto it. However in the following closeup, as she turns the page, you can see the page is different, and has three small seperate newspaper articles glued onto it. (01:13:40)
Continuity mistake: During the movie, the length of Chrissy's hair keeps changing.
Continuity mistake: During the seance scene, the girls hair often changes position during shots.