Other mistake: When they look at the negatives on the boat there is the typical holes at the top and bottom of the negative. Then they magnify a part within the picture. After they look at the magnified part, but the holes are still there.
Other mistake: When the Wesley Snipes character develops the film found at the dead girl's apartment, he notices the Secret Service guy and blows up that part of the picture, the printout has black borders like a full frame of a film, even though it is only a section of the frame.