'bzr check' returns an internal error

When doing a 'bzr check' the following is displayed:

Format <RepositoryFormatKnit1> for file:///home/paul/Tartan-3/.bzr/ is deprecated - please use 'bzr upgrade' to get better performance
Checking working tree at 'file:///home/paul/Tartan-3/'.
Checking repository at 'file:///home/paul/Tartan-3/'.
bzr: ERROR: exceptions.KeyError: ('wgc310.jpg-20050729071740-412f90b3e2949fbb', '<email address hidden>')

Traceback (most recent call last):
  File "//usr/lib/python2.5/site-packages/bzrlib/commands.py", line 893, in run_bzr_catch_errors
    return run_bzr(argv)
  File "//usr/lib/python2.5/site-packages/bzrlib/commands.py", line 839, in run_bzr
    ret = run(*run_argv)
  File "//usr/lib/python2.5/site-packages/bzrlib/commands.py", line 539, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "//usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 2513, in run
    check_dwim(path, verbose, do_branch=branch, do_repo=repo, do_tree=tree)
  File "//usr/lib/python2.5/site-packages/bzrlib/check.py", line 302, in check_dwim
    result = repo.check()
  File "//usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "//usr/lib/python2.5/site-packages/bzrlib/repository.py", line 1889, in check
    return self._check(revision_ids)
  File "//usr/lib/python2.5/site-packages/bzrlib/repository.py", line 1893, in _check
    result.check()
  File "//usr/lib/python2.5/site-packages/bzrlib/check.py", line 84, in check
    self.check_one_rev(rev_id)
  File "//usr/lib/python2.5/site-packages/bzrlib/check.py", line 195, in check_one_rev
    self._check_revision_tree(rev_id)
  File "//usr/lib/python2.5/site-packages/bzrlib/check.py", line 234, in _check_revision_tree
    ie.check(self, rev_id, inv, tree)
  File "//usr/lib/python2.5/site-packages/bzrlib/inventory.py", line 282, in check
    self._check(checker, rev_id, tree)
  File "//usr/lib/python2.5/site-packages/bzrlib/inventory.py", line 494, in _check
    if (self.text_sha1 != tree._repository.texts.get_sha1s([key])[key]):
KeyError: ('wgc310.jpg-20050729071740-412f90b3e2949fbb', '<email address hidden>')

bzr 1.10 on python 2.5.2 (linux2)
arguments: ['/usr/bin/bzr', 'check']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: None
plugins:
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.