I don't believe that there is any need for errata.bestone said:But to each his own, and untill errata comes out, there will be difference of opinions and arguments
it would seem a significant oversight to not include Sunder under the 'Full Round Action (full attack)' and also exclude it from the footnote 7 on the 'Action Type Varies' table where it clearly articulates disarm/grapple/trip to substitute for a normal attack or even an AOO. But it is listed under Standard Action and uses a melee attack opposed roll as its resolving mechanism. I don't see any problems with that.