Twonky v5 pretty bad (as opposed to v4)

Here is an example radio playlist of mine, that works fine with Twonky v4 and the WD TV Live. It is just a text file with the ending “.m3u” having the following content:

#EXTM3U

#EXTINF:-1,HR3 MP3 Stream
http://metafiles.gl-systemhaus.de/hr/hr3_2.m3u

#EXTINF:-1,HR4 MP3 Stream
http://metafiles.gl-systemhaus.de/hr/hr4_2.m3u

#EXTINF:-1,HR1 MP3 Stream
http://metafiles.gl-systemhaus.de/hr/hr1_2.m3u

#EXTINF:-1,HR Info
http://metafiles.gl-systemhaus.de/hr/hrinfo_2.m3u

#EXTINF:-1,HR2 Kultur MP3 Stream
http://metafiles.gl-systemhaus.de/hr/hr2_2.m3u

(It is just a list of the public broadcasting channels of Hessen, a state of Germany.)

This .m3u-file is contained in any subdirectory of the music directory that Twonky monitors. Its position has no effect, i.e.  when the WD TV Live connects to Twonky v4,the playlist is then available under “Internet Radio”, but not under “Playlists”, where all the other playlists are found.