Clearly, Blogger means that the Church "accepted" the Old Testament Hebrew canon of Jamnia (the same council that declared Christians to be Jewish apostates), but since per Hippo/Carthage we clearly have not I would like a clarification as to what is he referring to.
At least that is all I can see
The Church used Septuagint all along ewven when the Church was still made up of observant Jews. There was never "acceptance" of the Old Testament; it was part of the Church all along.
Who cares what the rabbinical scholas concluded at Jamnia! Among other things, the rabbis there ordered all the Jews to "curse the name of Jesus of Nazareth." I wonder if that is still part of their religious routine.