Trivia: When Keith Richards is looking up the rule in the pirate code book, the skull ring on his finger is not a prop; he has worn it since receiving it for his birthday in 1978 from a famous London goldsmith, who used a real skull when modelling the design.
Continuity mistake: The worn areas of Jack's leather hat drastically changes throughout the film. Additionally, the hat has a threaded 'X' on both its right and left side. In numerous close-ups extra thread holes are visible in different areas near each of these Xs; such as in the Locker, when Jack lies on the ground as the Pearl passes by and later, on the little island, before Jack switches places with Will. In other shots those extra holes are gone, such as when Jack sets sail for the Fountain of Youth. The actual sizes of the Xs also change.
Continuity mistake: Elizabeth has a beauty mark above the corner of her right eyebrow which actually disappears in some of her close-ups. For instance, when she is with Norrington and asks, "Know what? Which side you chose?" and later, when he kisses her. Later, in the scene with her son, the beauty mark is gone in one close-up and then just reappears in the next one, as she glances at her son.
Continuity mistake: When Captain Teague looks up the Code in the book by Morgan and Bartholomew, in the close-ups the fingers of his right hand runs across the line "It shall be the duty of the Pirate King", but next wideshot it's his left hand doing the page scanning, with his right hand at his side.