I just noticed the driver wasn't working in my M2v3 I have for my upper center channel. I exchanged it with one from a VP100v2 I had in a box and it works fine. I sent an e-mail to Axiom's service and don't expect any problems.
I was told last week that a new 5 1/4 inch vers 3 driver would be on it's way this week.
After listening to the system with a Vers 2 driver in the M2 box, I can say that this driver probably has been out for a long time. Female voices are a bit sharp sounding with the current setup, so I had to turn the center channel down about 2 db. It will be interesting to see if the V3 driver fixes it. If not, I'll probably have to removed the M2 from the mix.