if I attempt to defer an already due item, that causes an error. if I attempt to update an already due item to today that causes an error, too, and I can’t save my most recent work.
(as I said in my subject line, I have not yet updated to 2.1.2 so far, simply because you can’t yet get it on the App Store. when I tried updating to 2.1.2, the app would not recognize that I had paid for it.)