If you go into the Downloads section then you'll see a link; follow that and you'll see 2 firmware files lying there - v1.2 Beta at the top and v1.1 under that.
The 1.2 Beta is stable.
In respect of the new functionality it offers:
1. New screen size calibration in Setup Menu
2. Zoom functionality improved - Zoom to Width , Zoom to Height, Zoom stretch to X%:Y%
3. NFS client added – ie c/”foldername” tested on Windows with ProNFS
4. Local HDD -- If no multiple partition changed to not show local volume ie C:
5. Config Save & Restore under Firmware Update in Setup Menu
6. List sorting improved - resolved upper and lower case text sorting
7. Removed Trash Can in File Manager
8. Cool System Info Screen layout change - Setup Menu