Hmmm...

A thought.

I have always been blaming the fact that my syncs were failing based on the number of fids. But my problem sounds exactly the same: through emplode (not jemplode), all of the track are copied up and it starts to rebuild the database. It does not happen immediately and emplode times out. The database build occurs on the player, it reboots - missing the database / playlists / tags files. I also notice that I fidsifted my player, but all the new files are still in the fids directory.

A connection?