bzr: ERROR: bzrlib.errors.BzrCheckError: Internal check failed: file u'/usr/local/lib/libboost_serialization.so' entered as kind 'file' id 'libboost_serialization.so-20060624143356-7ed963981620c13c', now of kind 'symlink'

Traceback (most recent call last):
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 612, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 574, in run_bzr
    ret = run(*run_argv)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 283, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 584, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/builtins.py", line 1214, in run
    old_label=old_label, new_label=new_label)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/diff.py", line 341, in diff_cmd_helper
    extra_trees=extra_trees)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/diff.py", line 366, in show_diff_trees
    extra_trees=extra_trees)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/diff.py", line 394, in _show_diff_trees
    extra_trees=extra_trees, require_versioned=True)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/tree.py", line 83, in changes_from
    require_versioned=require_versioned,
  File "/usr/local/lib/python2.4/site-packages/bzrlib/decorators.py", line 38, in read_locked
    return unbound(self, *args, **kwargs)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/tree.py", line 410, in compare
    specific_file_ids)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/delta.py", line 277, in _compare_trees
    new_path, new_class, new_kind, new_file_id, new_entry = get_next(new_files)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/delta.py", line 181, in get_next
    return iter.next()
  File "/usr/local/lib/python2.4/site-packages/bzrlib/workingtree.py", line 805, in list_files
    raise BzrCheckError("file %r entered as kind %r id %r, "
BzrCheckError: Internal check failed: file u'/usr/local/lib/libboost_serialization.so' entered as kind 'file' id 'libboost_serialization.so-20060624143356-7ed963981620c13c', now of kind 'symlink'

bzr 0.10.0 on python 2.4.3.final.0 (freebsd6)
arguments: ['/usr/local/bin/bzr', 'diff']