Error while committing revisions. ValueError: list.remove(x): x not in list

Committed revision 110
Committed revision 111
Traceback (most recent call last):
  File "./svn2bzr.py", line 194, in <module>
    main()
  File "./svn2bzr.py", line 187, in main
    log=log)
  File "./svn2bzr.py", line 88, in svn2bzr
    creator.run()
  File "/home/david/svn2bzr/svn2bzr/branchcreator.py", line 622, in run
    entries = self.filter_entries(entries)
  File "/home/david/svn2bzr/svn2bzr/branchcreator.py", line 671, in filter_entries
    entries = self.filter_moves(entries)
  File "/home/david/svn2bzr/svn2bzr/branchcreator.py", line 720, in filter_moves
    entries.remove(de) # rem perfectly matching del entry
ValueError: list.remove(x): x not in list

Any one have any idea why I'm getting this?