Feedback received from an author yesterday:

It is always a little embarrassing to find so many, many changes to make when we all thought we had done a very thorough job first and second time around! But this is also testament to the excellent job the copy-editor has done (as one works through the corrections one develops an intuitive feeling for this individual's personality), and the professionalism of NIAS Press in insisting that everything is done properly.

We try.