Other mistake: When Sarah smokes in James' office he tells her that he doesn't like it because of the fire hazard. Therefore, it doesn't fit in the picture that he doesn't react when she puts out her cigarette in the waste paper basket, certainly a serious fire hazard and worth checking even if James' comment had been a joke. (00:22:40)
Other mistake: On one of the first days at the school James comes jogging on the beach. He starts throwing pebbles into the water, and then he notices Sarah who is sitting on a rocky spit. That the camera catches her only when it pans over is understandable, but he should have noticed her the moment he came to the beach. (00:25:45)
Other mistake: When James has his students over at his place they watch TV at full blast. You hear guns shooting and rubber burning. All of a sudden the noise stops and they leave, and Lydia says that the movie is over - which it surely wasn't the way the sound ended, and there is no indication that they just wanted to be nice and leave him in peace. (01:11:30)