Using the most recent incarnation of the 1.9er opt-in the game does crash/freeze for me heavily.
I had two freezes in which I could not even shut down the game/my machine anymore regularly - had to power off to reboot. In another instance after launching the game and going through the game setup my machine went off itself.
The most recent freeze did come after I had validated all my my files and switched to no mods again (in reaction to the game shutting off my computer earlier).
I never had stability probs like these explicit crashes or freezes before (not counting the "stuck on wait" problem, which is still there, but does *not* end in a crash or a complete freeze - I could always exit or save/reload normally when it occured in recent games)
Does anybody has similar probs or an idea what to do?