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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"And since it is becoming that holy things be administered in a holy manner, and of all things this sacrifice is the most holy, the Catholic Church, to the end that it might be worthily and reverently offered and received, instituted many centuries ago the holy canon, which is so free from error that it contains nothing that does not in the highest degree savor of a certain holiness and piety and raise up to God the minds of those who offer."
— Council of Trent (1562)
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.