When I click Spotify (within the Squeezebox iPhone app, iPeng Classic and iPeng 8), only around 250 playlists are returned.

All three apps stop at the same place, so it's a matter of what is returned by the server - not the individual app.

I have been in contact with the iPeng people, and they were the ones who explained it to me.

I hope it is fixable - I miss listening to a whole bunch of my playlists!