not sure if you're still looking for an answer...
I found the same thing, and I think it is an intended behaviour, not a bug:
When playing Favourites, the track skip buttons switch between the favourites in your list, and not within the playlist.
You can work around this by assigning these playlists to one of the number keys - when using these, the track skip with a playlist works fine!
Another thing: Don't you have any problems with the favourites created? My iRadio4iPod creates them in the following format:http://
But they should be http://
Therefore, the favourites for anything coming from Twonky don't work.
I always need to change the bold parts by hand in the web interface (re-creating the favourites, as there is no edit option), to make them work - very annoying.
Is there any way to find out these URLs directly from Twonky? Like Twonky -> All Songs relates to URL xyz? That way I could at least create such favs directly through the web-interface, without switching from Noxon to PC and back (which are not in the same room...)