I hate to say this but if you find 1.0X very unstable, odds are, 1.1 will be unstable for you as well.
If you have a URL to your smartexception reports, I'll certainly look at them. But 1.1, while fixing glitches and bugs as we find them, is primarily about new features. We're really not aware of very many reproduceable crashes that aren't solved by driver updates (though certainly in the 1.1 betas we introduced and later fixed a lot of new bugs).
That isn't to say 1.1 won't work better for you, but if you find 1.0X really unstable, that's not a good sign.