By identifying her self as Catholic and publicly questioning the Church’s teaching, she has committed scandal. There are people who will see her as an authority and she has used that authority to lead others to sin.
I sometimes really want to know what the Pope said to her back during that private meeting back on 02/18/2009. She went away from that meeting a bit sour-faced . . . now if Benedict XVI publicly excommunicated her for her present-day comments, what would that do for her career?