Good list of diagnostic steps to start with there, thanks. Especially the bit about how you ran the builder. (Take off and nuke the site from orbit, it's the only way to be sure.)

Follow up questions:

1. Is it always the same song giving you the issue? Or is it all songs?

2. Did the problem only start happening after you ran MaxFid and FidSift, or did the problem happen before that?

3. What method is being used to reboot the player when this problem occurs? Does it also occur if you reboot using the Hijack menu option for restarting the player?

4. Are you using a customized Config.Ini file, and does the problem happen only after you put the custom Config.Ini back on the player after reformatting it?

5. When you ran it, the builder *did* format the hard disk completely, right, all the songs were gone and you had to re-synch them all, right?