Question: Why does Elizabeth take the medallion with her after her blood fails to lift the curse? She knows that it "calls to them", so it would only act as a homing beacon, but she doesn't know that they're after Will specifically, in fact, at that point, only Jack knows that. So why would she risk the pirates coming after them?
Friso94
Revealing mistake: When Elizabeth gets out of the water on the little island, you can see a modern day bra through her dress. (01:31:25)
Chosen answer: She does realise they are after Will, she called herself Turner and Barbossa reveals they need a Turner, meaning Will. She takes the medallion with her because it belongs to Will.
lionhead