I don’t know what is going on on Digium but i must admit i cannot follow their releases anymore
Have a look on the announcements
Asterisk 1.2.0-beta1 29 Aug 2005
Asterisk 1.2.0-beta2 1 Nov 2005
Asterisk 1.2.0-rc1 9 Nov 2005
Asterisk 1.2.0-rc2 12 Nov 2005
It appears that we will have a stable 1.2.0 till the end of the month.
I will do some tests in my production voip with the 1.2.0-rc2. The machine still runs on 1.2.0-beta1 and i want to upgrade it but i have no spare time…