Everything was acceptable on FreeNAS 0.7.2, however updates had halted, FreeNAS took a leap to version 0.7.5, which there is no official upgrade route from 0.7.2, then 0.7.5 seems to have branched off into NAS4Free.
So what to do?
Make a backup of your configuration. (Web GUI 'System|Backup/Restore') Modify the configuration by changing the upper most and the most lowest stringon the configuration to andrespectively. Change the version to 1.0. Burn the Live CD (ISO) and install NAS4Free. Restart the server without the CDROM. Import your modified configuration (Web GUI 'System|Backup/Restore') and restore.
Update: NAS4Free has an upgrade path from FreeNAS now.
Notes can be found at the following location:
This version supports upgrading from FreeNAS 0.7.2 or 0.7.5. The supported lowest config version is 8.9. (0.7.2.5246)