Here's the changelog from the downloads page:
[Firmware Release Note]
*Ver1.07 [Feb. 27, 2009]
- Solve undetected unit problem after reboot when disk partition is removed.
- Solve automatic IP address problem for non DHCP server environment of version 1.06
- Solve Group/User name and ID can not be configured properly during creation.
- Function switch does not work problem during stand-by.
- Solve Web Access access restriction does not work problem under some shared folder name condition.
- Solve media sever update problem.
*Ver1.06 [Jan. 16, 2009]
- Solve media file compatibility with Sony PlayStation3.
(Supporting .avi .mp4 .m2ts)
- Solve unable to remove BitTorrent folders and files.
- Eliminate trash folder from backup source.
- Solve missing upload button of WebAccess page.
(This symptom is occurred under some languages UI except English, German and Japanese.)
- Solve MediaServer automatic refresh problem from firmware version 1.04.
*Ver1.05beta [Jan. 9, 2009]
- Fixed unable boot up system when disk failure error happens.
- Solve unable to change password by new created user login.
*Ver1.02 [Oct. 7, 2008]
- Fixed recording problem via Toshiba's REGZA TV sets sold in Japan.
