John Allen maintains that the motu proprio liberalizing the use of the Tridentine rite of Mass is real and should be out soon.
EXCERPT:
An April 3 letter from Cardinal Walter Kasper, who among other things heads the Vatican’s Pontifical Commission for Religious Relations with Jews, responds to concerns from the International Council of Christians and Jews about the pre-Vatican II Mass, in light of controversial passages it contains regarding Judaism. The last sentence of Kasper’s letter, the text of which I have, is the key line: "While I do not know what the pope intends to state in his final text, it is clear that the decision that has been made cannot now be changed."
Kasper’s language clearly indicates that something definitive has happened. It adds to the confirmation given by the Vatican’s Secretary of State, Cardinal Tarcisio Bertone, on March 31 that a motu proprio from Benedict XVI, meaning a document under the pope’s personal authority, on the pre-Vatican II Mass is coming.
But when will it appear?
The hot tip now is April 30, the feast of St. Pius V on the Roman calendar, or May 5, the feast of Pius V on the older calendar.
Allen’s story points out that certain prayers in the Tridentine rite may offend interreligious sensibilities, and it will be interestng to see what, if anything, is done regarding them. While one of the most troublesome passages was removed by John XXIII, if the Holy See were to take swift action to alter more passages, it would undercut the effect of liberalizing the rite before it could have its impact.

