Mmmm.. I just tried this out on my player, and noticed that "emptool" doesn't seem to use the new structure when uploading playlists -- it just drops them into /drive0/fids/ instead of into /drive0/fids/_00000/

Yes, the player will recognise and read new-scheme FIDs, but any new FIDs created by the player (i.e. by Emplode etc.) will be old-scheme.

Whether just editing a playlist will make it migrate from new-scheme to old-scheme depends on how Emplode was written -- I can't remember now whether it deletes and recreates the FID (which would count as a new FID and thus be old-scheme) or whether it overwrites in-place (which would preserve the new-scheme FID).

Peter