Yes, the language was (intentionally) stabilized with 1.0. So version 1.1 (the current one) is fully compatible with that, and this will remain so for the whole 1.x series. And I expect that even 2.x won't be as bad (if at all) as the major changes that were made during the early evolution of the language.
Amazingly, even packages have started to stablize.
Even though a great many of them are on there own v0.x,
they are both moving towards theire 1.0 releases,
and being more careful about not breaking there v0.x releases.
