Just in time for the opening of RailsConf, we managed to push out the first release candidate of Rails 4.0. This incorporates no less than 1,368 commits since beta 1. You can see the full list of changes on Github. If you’re interested in a high-level review of what’s in Rails 4.0, please see the announcement we made for beta 1. As last time, please give this release candidate an honest try. This