The 3.1.x series is now stable. Here are the highlights:
3.1.0 Highlights
- Autoload support (moving away from middleman-more)
- New Configuration System
- New v4 Extension API
- `/__middleman’ inspector
- Added Ruby 2.0, dropped Ruby 1.9.2
- Fully tested on JRuby 1.9
- Build defaults to --clean
Full Changelog: https://github.com/middleman/middleman/blob/master/CHANGELOG.md
Please report regressions on Github, this is a minor version release so it should be fully backwards compatible.