Kurgan says "If one is not in agreement with the Pope, one is wrong, not the Pope."

We, as faithful orthodox Catholics, are obligated to agree with the Pope on some, but not all things.  

Here is an article relevant to this that is pretty good start at explaining the limits of papal infallibility and where faithful orthodox Catholics are and are not free to disagree with the Pope.

Papal fallibility
http://edwardfeser.blogspot.com/2015/11/papal-fallibility.html

Another article is here:

Three things the Pope can’t say
http://www.catholicculture.org/commentary/the-city-gates.cfm?id=1383