Continuity mistake: This is just after Curt has jumped into the lake. The green towel around Marty's neck disappears and reappears. (00:22:00)
Continuity mistake: When housewife Alice is trying to escape with her daughter in the laundry room, she slams a mop through the ceiling. When she slams the mophead through the ceiling the last time and pulls it out, the hole left behind is maybe one foot across. When she lifts her daughter up into the hole it is now a good two or three feet across and reaches from ceiling support beam to support beam. (00:09:20)
Continuity mistake: In the secret covenant, the amount of blood on Eve's white top decreases when Olivia the vampire doctor examines her wounds. This is most noticeable under the collar. (00:34:20)
Continuity mistake: Running from the bullies, Taylor steps on a garden rake which pops up and nails him in the face, making him fall over backwards. The rake lands at his feet, but some distance from him. A couple shots later as he's trying to get up, the rake is suddenly beside him. (00:37:30)