Continuity mistake: When Rae makes the lemonade laced with sleeping pills, she adds several ice cubes. When Hughie goes to drink it soon after, all of the ice has melted.
Other mistake: When Nicole is getting attacked near the of the movie, they are seen struggling in silhouette behind a sail. You can see they are facing off to the left of the camera shot. When Ben shoots an emergency flare at Ben through the sail, it somehow ends up in his mouth. Also the sail should have stopped the flare then caught on fire. In the movie it puts a perfect burn hole in the sail and no fire.