The conversion of the original CATSS betacode into unicode relies on beta2unicode.py, a script published by James Tauber. James has just done an early release of greek-utils, which includes an updated version of the betacode converter. I tested the new version with the CATSS conversion process, and discovered that it produces the same output, with an exception.
Thanks to a bug-fix in the new version, a fault in the existing unicode texts has been discovered and corrected. Specifically, initial ρ was marked with smooth breathing marks instead of rough breathing. This changed 1,017 lines in 58 of the books.