Confluence 1.3-DR1 is the first of our experimental Development Releases on the road to 1.3. These snapshot builds let us deliver features more regularly to people who don't mind being on the bleeding edge, give customers early access to features they may have been waiting months for, or just let you guys see how the next major Confluence release is shaping up.
While we make an effort to ensure that we're in a stable and releasable state in time for each DR build, development releases may contain unfinished features, or interesting bugs. If you don't want to follow the development releases yourself, we'll be running the most recent DR build on on http://confluence.atlassian.com/. (We're also running our private extranet on DR1. We don't release anything we wouldn't run ourselves.)