doesn't handle non-ascii characters in update information

I get the following error when attempting to use PackageKit-gnome to update my system

Error Type: <type 'exceptions.UnicodeEncodeError'>
Error Value: 'ascii' codec can't encode character u'\xef' in position 544: ordinal not in range(128)
  File : /usr/share/PackageKit/helpers/apt/aptBackend.py, line 1966, in <module>
    main()
  File : /usr/share/PackageKit/helpers/apt/aptBackend.py, line 1963, in main
    run(args, options.single)
  File : /usr/share/PackageKit/helpers/apt/aptBackend.py, line 1925, in run
    backend.dispatcher(args)
  File : /usr/lib/python2.6/dist-packages/packagekit/backend.py, line 643, in dispatcher
    self.dispatch_command(args[0], args[1:])
  File : /usr/lib/python2.6/dist-packages/packagekit/backend.py, line 533, in dispatch_command
    self.get_update_detail(package_ids)
  File : /usr/share/PackageKit/helpers/apt/aptBackend.py, line 735, in get_update_detail
    updated)
  File : /usr/lib/python2.6/dist-packages/packagekit/backend.py, line 235, in update_detail
    print >> sys.stdout, "updatedetail\t$s\t$s\t$s\t$s\t$s\t$s\t$s\t$s\t$s\t$s\t$s\t$s" $ (package_id, updates, obsoletes, vendor_url, bugzilla_url, cve_url, restart, update_text, changelog, state, issued, updated)

This is on x86_64 running Karmic

david@dawkins:~$ apt-cache policy packagekit packagekit-backend-apt

packagekit:
  Installeret: 0.4.8-0ubuntu3
  Kandidat: 0.4.8-0ubuntu3
  Versionstabel:
 *** 0.4.8-0ubuntu3 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status
packagekit-backend-apt:
  Installeret: 0.4.8-0ubuntu3
  Kandidat: 0.4.8-0ubuntu3
  Versionstabel:
 *** 0.4.8-0ubuntu3 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status