nostalgiafm creates an empty playlist


It seems to crawl correctly my music collection, then the months appear with a number between brackets so I guess that's the number of tracks found for that month. Then from a simple selection, or even selection all months I do "save" and the produced file simply has the #EXTM3U at the top of the file (doing launch loads a player with an empty playlist so I'm guessing the tempfile is the same).
The panel on the right is always empty. The dropdown menu at the top only has "Local Playlist".
$ java -version
java version "1.6.0_10"
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Client VM (build 11.0-b15, mixed mode, sharing)
On an ubuntu intrepid ibex,