The release notes for Linux Mint can be found at
http://www.linuxmint.com/rel_qiana_cinnamon.php.
The new features are as follows:
- Improved update manager
- The driver manager can now install drivers without an internet connection
- Refined MDM login manager and multi monitor support improved
- HTML greeter comes with HiDPI support
- MDM now has a recovery command
- Language Settings tool added to make it easier to select your language
- Improved Software Sources display
- Welcome screen now uses less resources
- Improved graphical interface for system settings
- Power management and screen saver settings redesigned
- Menu improvements
- HUD and Hover Management Improvements
- MPRIS support added
- HiDPI and Retina display support added
- The "WACOM" plug has been re-introduced
- Windows opacity improvements
- Better integration with Gnome
- Better support for GDM
- Support for MDM failback shutdown sequence
- New shutdown hotkey
- Lots of bug fixes
