Continuity: When Billy is holding logs still for George to chop, the second log he puts on the stump is striped of any bark. But when George swings down to chop it, the log is suddenly covered in bark.

Continuity: When Kathy and George kiss on the bed, and in following shots, the mug on the desk to the viewers right of the bed constantly rotates itself, evident by the mug handle.

Revealing: When Chelsea is on the roof of the house and Kathy joins her, Kathy's hair is blowing in the wind, while Chelsea's stays perfectly still, the water in the lake is also perfectly still. Obviously the director had the actors do the scenes separately until we see them both together in which case both characters hair is blowing around.

Continuity: When George is laying in the bath and two arms grab him, the hands are all slit around the wrist, but in the next shot they're not.

Revealing: Ryan Reynolds is wearing red-eye contacts. You can see the whites of his eyes around the red circle of the contacts in several scenes - most noticeably, right after the home movie he's watching down in the basement melts.

Audio problem: When Chelsea is screaming "Liar! Liar! Liaar!!" to her mother, Kathy, in one shot we see Chelsea's mouth still saying "liar," but no audio is heard.