A 'quick search' on the above yields a rather cogent discussion on the issue. It goes straight to the heart of my previous (tonite) post and is consistent.
http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass.html
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...