Traceback (most recent call last):
  File "/usr/bin/duplicity", line 1359, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1342, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1222, in main
    globals.archive_dir).set_values()
  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 684, in set_values
    self.get_backup_chains(partials + backend_filename_list)
  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 807, in get_backup_chains
    map(add_to_sets, filename_list)
  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 797, in add_to_sets
    if set.add_filename(filename):
  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 94, in add_filename
    (self.volume_name_dict, filename)
AssertionError: ({1: 'duplicity-full.20111027T152856Z.vol1.difftar.gpg', 2: 'duplicity-full.20111027T152856Z.vol2.difftar.gpg', 3: 'duplicity-full.20111027T152856Z.vol3.difftar.gpg', 4: 'duplicity-full.20111027T152856Z.vol4.difftar.gpg', 5: 'duplicity-full.20111027T152856Z.vol5.difftar.gpg', 6: 'duplicity-full.20111027T152856Z.vol6.difftar.gpg', 7: 'duplicity-full.20111027T152856Z.vol7.difftar.gpg', 8: 'duplicity-full.20111027T152856Z.vol8.difftar.gpg', 9: 'duplicity-full.20111027T152856Z.vol9.difftar.gpg', 10: 'duplicity-full.20111027T152856Z.vol10.difftar.gpg', 11: 'duplicity-full.20111027T152856Z.vol11.difftar.gpg', 12: 'duplicity-full.20111027T152856Z.vol12.difftar.gpg', 13: 'duplicity-full.20111027T152856Z.vol13.difftar.gpg', 14: 'duplicity-full.20111027T152856Z.vol14.difftar.gpg', 15: 'duplicity-full.20111027T152856Z.vol15.difftar.gpg', 16: 'duplicity-full.20111027T152856Z.vol16.difftar.gpg', 17: 'duplicity-full.20111027T152856Z.vol17.difftar.gpg', 18: 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'duplicity-full.20111027T152856Z.vol379.difftar.gz', 380: 'duplicity-full.20111027T152856Z.vol380.difftar.gz', 381: 'duplicity-full.20111027T152856Z.vol381.difftar.gz', 382: 'duplicity-full.20111027T152856Z.vol382.difftar.gz', 383: 'duplicity-full.20111027T152856Z.vol383.difftar.gz', 384: 'duplicity-full.20111027T152856Z.vol384.difftar.gz', 385: 'duplicity-full.20111027T152856Z.vol385.difftar.gz', 386: 'duplicity-full.20111027T152856Z.vol386.difftar.gz', 387: 'duplicity-full.20111027T152856Z.vol387.difftar.gz', 388: 'duplicity-full.20111027T152856Z.vol388.difftar.gz', 389: 'duplicity-full.20111027T152856Z.vol389.difftar.gz'}, 'duplicity-full.20111027T152856Z.vol201.difftar.gz')

After having done the backup it seems that it calculates some sums and than it crashes with an "unknown error".

Ubuntu Oneiric latest updates included