My player won't play WMAs either - or even display them although I know they are there as you can read them from the PC. WM10 does work with the syncronise function without a problem as long as the files are MP3s.
My player is now not working because I upgraded the firmware to try and fix the problem :o(
If you can find a font file on yours (in system/font) could you mail it to me jamesbb@btconnect.com) as that apears to be the problem with mine!
Cheers, James
James BB
November 2005