Deja Dup Restore Failed with an unknown error

I have created a daily backup using Deja Dup in Ubuntu 12.10. I have been able to restore the last FULL Backup (30 September), but am not able to restore any backup since. The process always crashes with "Failed with an unknown error" followed by a crash-dump.

I have been able to restore some individual files and folders by using the "Restore Missing Files" option in Nautilus, however I have not been able to recover the files I need most (desperately). When I attempt to do a full recovery, it always crashes on Thunderbird files (see dump below). When I try to restore individual files, the crash dump is similar but often specifying other files.

Any ideas to move forward?

A sample crashdump looks like this:

Failed with an unknown error.

Traceback (most recent call last):
  File "/usr/bin/duplicity", line 1411, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1404, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1338, in main
    restore(col_stats)
  File "/usr/bin/duplicity", line 632, in restore
    restore_get_patched_rop_iter(col_stats)):
  File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 526, in Write_ROPaths
    for ropath in rop_iter:
  File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 499, in integrate_patch_iters
    final_ropath = patch_seq2ropath( normalize_ps( patch_seq ) )
  File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 463, in patch_seq2ropath
    assert first.difftype != "diff", patch_seq
AssertionError: [(('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg), (('home', 'henny', '.thunderbird', 'iiwshpb5.default', '.parentlock') reg)]