Just an update on the failure of the transmitter to sync with the base post firmware upgrade issue...
As suggested by others, I unplugged my base and set the transmitter on the side for about an hour (because I'm impatient) then tried it again and it still didn't work. Then I forgot about it for 2 days and tried it again - and it worked. I guess some component needed to fully discharge before resetting. Just a fancy case of "have you tried turning it of and back on again?" ;-)
Having said that I am also experiencing the shortened battery life after the firmware on 2 of my G10 units. I suspect the 3rd has it too but it takes a while to prove so I'll be testing that one this afternoon. Then it's ticket time because a 2 hour battery life doesn't cut it for a 3 hour gig.