Right before the black typewriter breaks down, at the 21.44 mark, Merlin is briefly typing on the new white typewriter that he will buy later in the movie.
In Tatiana's bungalow, Bob Sinclar watches a movie screen displaying the shark attack of the opening scene. The cigarette smoke disappears behind the screen, showing that the film with the shark was added after the scene was shot.
When Bob Saint-Clair is on a canoe in Alaska (at the 46:40 mark), he picks up his rifle and aims it and two shots are hard, but nothing comes out of the rifle.