What does the Rambam mean here by it being a "masores b'yad ha'kol" -- everybody knows this tradition? Does he mean this tradition goes above and beyond what the "ba'alei mesorah," the leaders of each generation from Moshe through Ravina and Rav Ashi who were charged with preserving and transmitting torah sheba'al peh (as the Rambam writes in the intro to the Yad), dealt with? In what way is this mesorah different than any other mesorah of torah sheba'al peh and why?
Might the opposite be true -- could "masores b'yad ha'kol" mean this is simply a folk tradition and not part of what was preserved by the "ba'alei mesorah?" That strikes me as a far weaker reading than the first one, but I'm throwing it out there just to consider everything.
I haven't seen anyone who discusses this point. Suggestions, as always, welcome.