The doctrine of infallibility stands, Amos - but it is widely misunderstood. The process of an infallible declaration is very complex and heavily nuanced - in general, for a doctrine to be infallible, it has to be a statement of faith or morals that has been generally believed by the faithful for the entire history of the church. Since the doctrine of infallibility was declared in the 1870's, it has only been used twice - both times to add titles to the Blessed Virgin Mary that don't make a heck of a lot of difference. The current pope and his minions have made statements that they say "might as well be infallible" - stuff like their declaration that the church can't ordain women because women don't look like Jesus - but they haven't followed the rules for a true ex cathedra infallible statement. Declarations like that are official policy - but there is room for change.
But the older an institution is, the slower it changes. And the Catholic Church is very, very old.
-Joe Offer-