My comment relates to the HTML Playlist that gets sent out.
not the m3u files you get if you click on the 'play' link of a playlist.

The html 'table' you create for the root playlist (and playlist containg playlists) has a all blank table row entry [**including the Playlist name**], whenever the fields from the playlist are missing [i.e. even if the playlist name is present its not shown in the html table if all the other fields are missing from the playlist properties].

This sounds like a bug in the html table output routine.