Continuity mistake: When the girl is talking to the young guy on the beach she has a green shawl around her waist. Then in the next shot a few seconds later it is around her shoulders.
Continuity mistake: When Jenny first washes up on the island, her wrap is washed up around her torso so that we can see her bikini bottom. In the very next shot, the wrap is down around her legs. (00:01:35)