Shortly, we will be merging in support for Ember 1.11. This is an exciting release for Ember because it has many performance benefits over our current version of 1.09, so Discourse should be snappier across all platforms.
It is probable that the tests-passed/master branch of Discourse will have regressions. As always, use caution when running the bleeding edge of discourse in production. The latest beta of discourse does not have the ember upgrade included, so if you are on that you will not need to be concerned about this upgrade.
We’ll be running master here on meta and on our try.discourse.org servers. Report anything you see that isn’t working correctly here and we’ll fix it promptly!
When things have stabilized in this branch we’ll make a beta release, but only once we’re sure everything is running smoothly.
If you are a developer, please see this topic about deprecations.