After a great day of teamwork in preparing for today’s RC1 release it was the database that wouldn’t play along. Our code is ready, but we’re hitting glitches on the database on our new test server.
We’re now waiting for a new clean migration of the data which takes several hours, so we need to postpone the RC1 release for a few hours. 😦
We’re working hard to get RC1 out ASAP — stay tuned!
MetaBrainz Blog 
RC1 is live! 🙂