MrH mailed me the latest version of mi4code that now incorporates proper support for the recent Sansa 1.03.07 firmware (claimed to be beta, only available from some unofficial sansa fan sites, such as anythingbutipod.com), and I’ve uploaded it to the mi4code page.

Note that we still don’t advice anyone to actually use the unofficial 1.03 version as it has been reported to be bad in several aspects, such as the removal of MSC mode!