Continuity mistake: After Barry has jumped into the water reclaim the crown, he comes out of the water with a perfectly clean shirt, but in the next shot the blood is back on his shirt as expected. (00:22:50)
Continuity mistake: Max lies dead in Julie's car covered in crabs. He was hooked very deep under his chin, yet when we see him, the wound is gone. (00:59:15)
Continuity mistake: When Julie comes home and finds the letter, her lips are pale and she is not wearing lipstick. When the shot shifts focus from the letter to her face again, however, she is wearing purplish lipstick.
Continuity mistake: When the Fisherman jumps out at the girl in the store when he is in the plastic bag, he misses and falls to the floor. If you look at the Fisherman when he is on the floor and waving his arms notice he isn't carrying his hook. However, in the next shot when he is standing up, the hook is in his hand again.
Continuity mistake: Ray falls off Ben's boat towards the end. Yet when he gets back on board he's dry.
Continuity mistake: When Julie gets on Ben's boat, she sees a picture of Helen at the parade from that day. This implies Ben took a picture at the parade, got it developed, then went back and killed Barry and Helen. There's no way.