Sure!
What was loosed after it was bound?
I was being ironical. ;o)
But...I can think of several areas where the Roman Catholic church - through the Pope - declared something to be binding but which was changed at a later date. If you are interested in reading about a few of them, may I suggest http://peacebyjesuscom.blogspot.com/2011/09/contradictions-in-roman-catholicism.html