Continuity mistake: During the first meal in the new house, the level of Coke in the daughter's glass keeps changing as the camera cuts between her and her mother. The Coke can revolves as well. Sometimes the Coke-logo is visible, at other times the list of ingredients is facing the audience.
Continuity mistake: When Meg and Sarah are inspecting the house in the beginning of the film, Sarah's bag has pawprints on it in the first shot. In the second shot the pawprints change to faces.
Continuity mistake: The girl is inside the room with Forrest Whitaker and the other guy, about the time Whitaker picks up the red thing with the needle, watch the loose hair on the right side of her head, close to her ear: It keeps moving up, down, sometimes is wetter, sometimes dryer. And the girl barely moves.
Continuity mistake: When Junior is shot in the head, the original bullet wound is almost exactly between the eyes, but when you see him lying on the floor, the bullet wound is over his right eye