Factual error: The caption says "twenty years later" before the main part of the movie starts. Now judging by the dates we've seen on-screen so far that would be in the reign of William and Mary, not Queen Anne.
Continuity mistake: On the beach, Commander Clement has his arm wrapped around Triola. The next shot has Clement just putting his arm around Triola.
Harvey "Blind" Pew: It sounded as though there was a bit of a squabble.
Moon: Squabble? They're all dead.
Harvey "Blind" Pew: Oh! Must have been more of a tiff then.
Commander Clement: Twenty years ago today you were sentenced to jail.
Yellowbeard: Yes, and now I'm due to released.
Commander Clement: Yes. Or rather, no. You see, twenty years ago, no-one was expected to live in jail for twenty years.