I just looked at your https://ax...ww.com site. Let me know if that's not the correct one.
On that page, I don't see where the FB buttons are even being tried to be inserted. Can you check the JFBConnect -> Social configuration area and make sure they are enabled to be shown? Not sure why that would have changed when you upgraded, but possibly that setting got switched somehow.
Even if it looks correct, hit "Apply" to make sure everything is saved properly.
I hope that helps, but if not, let me know.
Thanks,
Alex