When a folder path is passed as argument in the command line, the folder shows up as single item in the playlist. A doubleclick on that item says "Unable to play file". Reproducible with 0.9.1 and 2006-05-27 svn checkout.
Adding folders from the command line is not currently supported.
(In reply to comment #1) > Adding folders from the command line is not currently supported. > Is it supported now?
Xfmedia is unmaintained.