Continuity mistake: In the airport scene Scott Caan introduces his new "girl" to Paul Walker and Jessica Alba. In the background behind Paul you see a long-haired brunette wearing a strapless shirt walk out of the terminal and continue past the camera. The shot changes to a wide angle of the four main characters, and a second or so after the change you see the same brunette come out of the terminal again.
Continuity mistake: The scene where Paul Walker and Scott Cann are wrestling in the water when the sharks show up, Paul Walker is wearing a diver's mask when they start. Then it cuts to a different angle and he is not wearing it, and then asks Jessica Alba to throw him his mask when he surfaces.