About this blogger:
A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004), and did graduate work in Musicology. He serves as choirmaster for the new FSSP parish in Los Angeles, where he resides with his wife and children.
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“I should not like to be too harsh on this commission’s labors. It numbered a certain number of genuine scholars and more than one experienced and judicious pastor. Under different circumstances, they might have accomplished excellent work. Unfortunately, on the one hand, a deadly error in judgment placed the official leadership of this committee in the hands of a man who—though generous and brave—was not very knowledgeable: Cardinal Larcaro. He was utterly incapable of resisting the maneuvers of the mealy-mouthed scoundrel that the Neapolitan Vincentian, Annibale, a man as bereft of culture as he was of basic honesty, soon revealed himself to be.”
— Fr. Bouyer, a liturgical expert appointed by Pope Paul VI
Editio Vaticana Errata
published 7 November 2010 by Jeff Ostrowski

As great as the Editio Vaticana is, it is not perfect in every detail.

Joseph Gogniat points out that the Vatican Edition sometimes fails to mark each liquescent:

Here is another instance where liquescents are missing:

N.B. This example was taken from Cantus Selecti, which is not (strictly speaking) part of the Vatican Edition.