Small update. Turns out I can stream a playlist by going as far as the tracklist and clicking the stream button next to the playlist name at the top, but not just by streaming a playlist in the main list. That's confusing, so I'll give an example.

I have a playlist called Basement Jaxx, inside which is another playlist called Remedy and one called Rooty. Clicking 'stream' next to either of these playlists results in nothing. However, clicking one of these playlists (giving me the tracks in the album), and *then* clicking the stream button at the top left will stream the playlist correctly.

Hope this helps,

A.