Hi
I don't have my T10 with me so don't remember the menu structure to ascertain Firmware version. This is info from iriver site
http://www.iriveramerica.com/support/mtpupdate/
Try opening that link and following the instructions. Basically it will download a small utility and check what version firmware you are running. If there is an update it should offer to update for you. Let me know how you go
Rob