3 Interesting Continuity Mistakes made in the movie:

1. When Chrissy’s body is found on the shore, it has been severely damaged by the shark attack, but is still mostly intact. When Hooper does his autopsy, there are far less bodily remains than were found on the beach.

2. At the town meeting, there are two shots of the reward sign posted by Mrs Kintner. The sign in the second shot is not the same as the sign in the previous shot, the handwriting is different.

3. When Quint is hauling in the rope from the first barrel and the shark appears suddenly, he jerks back in surprise and still has the rope in one hand only. The next shot shows the rope flying out of both hands, which are cut by the force.

Found here: http://www.imdb.com/title/tt0073195/trivia?tab=gf

Problems, Hair on Brody’s wife changes colors throughout the movie. Sound of the shark sucked!