Problems with DAAP on Ubuntu 10.10
Rhythmbox will not connect to a firefly (mt-daapd) server if it is running on the same machine on Ubuntu 10.10 Maverick Meerkat. Banshee will connect to it and show the playlists, but will not be able to play the songs. The servers work just fine though if you connect to them with Rhythmbox or Banshee from another Ubuntu 10.10 machine.
In order to make sure that this not just a borked 10.10 installation on one machine, I connected to the second machine's server from the first, worked fine. Connecting the second machine's clients to its own server did not work.
Problem temporarily handled by downgrading Rhythmbox to the versions for 10.4.