I think this guy has a point with:
https://github.com/emberjs/ember.js/commits/master/ember.jso...
"Ember is released in "revisions", because it's not production ready and not ready to be 1.0. Hence the core team chose to rather call breaking changes a new "revision". Well guess what dudes, that's exactly what versions are for. Why couldn't you just like normal people release 0.4, 0.5? Why do you need to hit 1.0 directly?"