The folks at Yorba say the key enhancements for the new Shotwell 0.15 release include:
- Copy and paste color adjustments between photos
- Highlights detail adjustment
- YouTube plugin now uses OAuth / OpenID
- Videos in Missing Files now re-import properly
- Improvements when thumbnailing videos
- Numerous bug fixes
More details on the updated Shotwell 0.15 release can be discovered via the release announcement.