Revealing mistake: As the three babies fly towards Mrs. Waterhouse, when they land on her it is blatantly apparent that they're merely three dolls in this shot. She actually grips two from behind and the center doll is attached to her as she moves backwards. Also, in the shot facing the babies the center baby is in the bouncer seat with the rod attachment overhead, yet, in the shot facing Mrs. Waterhouse the rod attachment is gone.
Continuity mistake: While Lucy is on the floating bed, only the floral blanket that Ray tossed is on the floor. After Ray helps Lucy off, they sit together across the room and in the next shot when the bed lands, the floral blanket and now a pink blanket are on the floor near the bed. When Lucy screams as Raggedy Anne pulls on her, the two blankets are visible across the floor and their positions differ.
Continuity mistake: When Frank arrives at the Lynskeys to take care of their ghost problem, he drives onto their lawn again. In the wide shot he takes down a piece of the picket fence, which falls squarely on top of the little statues, including little Bonzo's grave, and proceeds to drive toward the house. However, the next close-up is of the statues, who are still standing, and as the car runs over them the picket fence does not slam down on them like in the wide shot of the 'same' action.
Visible crew/equipment: During the scene where Frank's ghost pals haunt Lucy and Ray's house, Ray begins hitting a moving Raggedy Anne doll that is near them on the ground. Look closely - behind the doll you can see a black bar that is mounted to the ground, causing the doll to jump and move.
Continuity mistake: After Frank destroys Ray's fence, he backs the car over Budzo (the ceramic little gnome), crushing it on the lawn. Yet, when Ray picks him up crying out, "Oh, my Budzo! My Budzo!" he is holding the gnome's uncrushed head!
Other mistake: When Frank first runs into Ray's ghost on the street, and they duck into an alleyway to talk, Ray accidentally calls Frank (Michael J. Fox) by his real name "Mike" instead of his character name "Frank." Ray says "I felt this vise-like grip squeezing my heart, and I couldn't breathe, Mike."
Visible crew/equipment: When Frank is walking down the street, after he walks into the pierced man in the grim reaper T-shirt (Peter Jackson in a cameo) when he walks across the street when he gets hit by the black hearse, the camera man, the camera and a few crewmembers are visible in the car door.