Revealing mistake: On the way to Isla de Muerta aboard Interceptor, during the storm there is a close-up of Jack's hand holding the compass. There are many other close-ups of Jack's hand in the movie, but in this particular close-up, it is not Johnny Depp's hand holding the compass. Depp's fingers are slim and normal looking, but in this close-up Jack's thumb is stout and has a severely enlarged/deformed metacarpal at the base of the thumb joint (likely arthritis).
Picture added & edited by Super Grover
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