Regardless of the document that comes forth from the Vatican, whether from the papal or conciliar magisterium, it is assured, that in these latter days, there will be these dual interpretations, and so it is with the new encyclical from Pope Benedict XVI, Caritas in veritate.
Yet, as is usually true of all of the documents from the Vatican, there will be a deep current of Catholic doctrine flowing through it, treasure to be discovered by the careful reader whose only filter is that of the faith, whose perspective is Catholic, first.
As is this excerpt from another document, the Vatican II Pastoral Constitution Gaudium et spes , that engendered the dual interpretations, yet only had one really, as do they all, that of Catholic doctrine, renewed for the ages.
“Coming forth from the eternal Father's love, founded in time by Christ the Redeemer and made one in the Holy Spirit, the Church has a saving and an eschatological purpose which can be fully attained only in the future world. But she is already present in this world, and is composed of men, that is, of members of the earthly city who have a call to form the family of God's children during the present history of the human race, and to keep increasing it until the Lord returns. United on behalf of heavenly values and enriched by them, this family has been "constituted and structured as a society in this world" by Christ, and is equipped "by appropriate means for visible and social union." Thus the Church, at once "a visible association and a spiritual community," goes forward together with humanity and experiences the same earthly lot which the world does. She serves as a leaven and as a kind of soul for human society as it is to be renewed in Christ and transformed into God's family.
“That the earthly and the heavenly city penetrate each other is a fact accessible to faith alone; it remains a mystery of human history, which sin will keep in great disarray until the splendor of God's sons, is fully revealed.” (#40)