desktopcouch-pair crashed with DBusException in call_blocking()

Binary package hint: desktopcouch

if Avahi service isn't running, e.g: a .local domain is defined in the network. desktopcouch-pair fails to start with the following error.

guillermo@naug:~$ desktopcouch-pair
2010-04-15 14:30:12,434 [5807] root:DEBUG: starting couchdb pairing tool
2010-04-15 14:30:12,573 [5807] root:DEBUG: found 1 self_identity records
2010-04-15 14:30:12,574 [5807] root:DEBUG: paired back-connecting machine count is 2
2010-04-15 14:30:12,574 [5807] root:DEBUG: exiting couchdb pairing tool
Traceback (most recent call last):
  File "/usr/bin/desktopcouch-pair", line 908, in <module>
    main(sys.argv)
  File "/usr/bin/desktopcouch-pair", line 897, in main
    pick_or_listen = PickOrListen()
  File "/usr/bin/desktopcouch-pair", line 765, in __init__
    self.pick_pane = self.create_pick_pane(top_vbox)
  File "/usr/bin/desktopcouch-pair", line 560, in create_pick_pane
    remove_service_from_list, show_local=False)
  File "/usr/lib/python2.6/dist-packages/desktopcouch/pair/couchdb_pairing/dbus_io.py", line 239, in discover_services
    bus, server = get_dbus_bus_server()
  File "/usr/lib/python2.6/dist-packages/desktopcouch/pair/couchdb_pairing/dbus_io.py", line 54, in get_dbus_bus_server
    root_name = bus.get_object(avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER)
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 244, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 241, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 183, in activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 281, in start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Avahi was not provided by any .service files

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: desktopcouch-tools 0.6.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic x86_64
NonfreeKernelModules: wl nvidia
Architecture: amd64
Date: Thu Apr 15 14:51:45 2010
ExecutablePath: /usr/bin/desktopcouch-pair
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100113)
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/desktopcouch-pair
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/desktopcouch-pair']
SourcePackage: desktopcouch
Title: desktopcouch-pair crashed with DBusException in call_blocking()
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare