Rails 4.0: Release Candidate 1 released
This is a huge step forward to a big release! I myself built a little app with the RC, Ruby 2.0, and deployed it to Heroku yesterday, and that whole stack works just fine._Please_ give the RC a try, and file any issues you have on the tracker: https://github.com/rails/rails/issues?state=open There's nothing more frustrating as a maintainer than getting regression reports the day after you release when you've done two or three RC releases. :(I'd be happy to answer any questions you have about the release either here or over email, as well.