Revealing mistake: When Vanessa comes out of the girls shower and walks to her locker, in the back shot you can quite clearly make out the strapless bra she is wearing under her towel. Also, when she lifts her arm up you can briefly see the black material under the towel.
The Grudge 2 (2006)
1 revealing mistake - chronological order
Directed by: Takashi Shimizu
Starring: Sarah Michelle Gellar, Amber Tamblyn, Arielle Kebbel, Edison Chen, Takako Fuji
Continuity mistake: When Jake is told to take his soccer equipment and put it in his room, he takes it and sits on his bed, and shoves all the gear underneath his bed. In the next shot when Trish enters the room, half of the equipment is back out on the floor again.
Vanessa: That's where she lives.
Miyuki: Kayako.