I was doing it today and I noticed a few mistakes.
Number 16 Down asks what century POTC is centered around. I am certain that the answer I have is correct (I even Googled to double check) and it does not fit in the box that is for 16 down.
Just to point out, 18 down is also an incomplete question, although the end of it is pretty clear.
Other than that, very good crossword. Not too easy, but not pulling-my-hair-out difficult.
