I guess some more details would be needed; iTunes 7.0.1 on Windows and MacOSX (10.4.8) have no problems accessing mt-daapd here (svn 1376 I think).
Maybe you could describe what “broke” means? Are you still able to see the playlists, but not able to play? Can’t you see the server in iTunes at all? Can you still access the web interface? Have you checked if mt-daapd is still running? Is mt-daapd running on the Fedora or on the MacOSX machine?