@Anonymous - truly, I would not worry about it. It is SO unlikely that a change would affect you.... if it did, it would be something that affects millions of others. if you had filed by April 15, you would be none-the-wiser, just like the millions and millions of others that already filed.
did the refund / amount due change after the update? A dollar says 'no, it did not' - so what are you concerned about?
