Continuity mistake: Close to the beginning of the film, when Rachael and Brian are speaking at the desk where Rachael has been typing, between shots, a pencil appears next to her watch. This change happens right before Rachael says "I couldn't have done any of this without you".
Continuity mistake: Rachel asks why the boats are the same color as the houses. The reply is so the wife can look out and see her husband is OK. In the 1st scene of Rachel's cabin, It is white. Yet her boat is a solid color, med blue. Then in a later scene, it shows her cabin as blue, the same color as her boat. Then in all the later scenes, the cabin is white, again.