One of my friends has a Blackberry 8830 and sends me mp3 ringtones via bluetooth. When I receive them, I move them from My Documents to Windows/Rings. All is fine until I sync with my Vista machine at home with WMDC. After each sync, the files disappear from the Windows/Rings directory (WMA ringtones that reside there are unaffected).

FYI, the ringtones have funky filenames like &austinpowers%.mp3. I have renamed them, but the problem still occurs.

Any ideas?