bzr status crash w/ svn checkout

When I check out a repository with svn, then use bzr status, I get the following error message. I believe this is caused because of a directory named "I²C" in the SVN repository. However, I'm not sure why this is a problem, since the name is correct UTF-8, and my locale is (and always has been) UTF-8. No matter the cause, it shouldn't cause a crash.

bzr: ERROR: libsvn._core.SubversionException: ("Can't convert string from native encoding to 'UTF-8':", 22)

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 806, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 762, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 772, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 185, in run
    tree, file_list = tree_files(file_list)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 64, in tree_files
    return internal_tree_files(file_list, default_branch)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 88, in internal_tree_files
    return WorkingTree.open_containing(default_branch)[0], file_list
  File "/usr/lib/python2.4/site-packages/bzrlib/workingtree.py", line 352, in open_containing
    return control.open_workingtree(), relpath
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/svn/workingtree.py", line 739, in open_workingtree
    return SvnWorkingTree(self, self.local_path, self.open_branch())
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/svn/workingtree.py", line 80, in __init__
    status = svn.wc.revision_status(self.basedir, None, True, None, None)
  File "/var/lib/python-support/python2.4/libsvn/wc.py", line 1577, in svn_wc_revision_status
    return apply(_wc.svn_wc_revision_status, args)
SubversionException: ("Can't convert string from native encoding to 'UTF-8':", 22)

bzr 1.1.0.candidate.1 on python 2.4.4.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'status']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools [1.1.0]
  email /usr/lib/python2.4/site-packages/bzrlib/plugins/email [unknown]
  gtk /usr/lib/python2.4/site-packages/bzrlib/plugins/gtk [0.93.0]
  launchpad /usr/lib/python2.4/site-packages/bzrlib/plugins/launchpad [unknown]
  multiparent /usr/lib/python2.4/site-packages/bzrlib/plugins/multiparent.pyc [unknown]
  rebase /usr/lib/python2.4/site-packages/bzrlib/plugins/rebase [0.3.0]
  svn /usr/lib/python2.4/site-packages/bzrlib/plugins/svn [0.4.6]
*** 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.

This also comes up if I try to checkout with bzr instead of checking out with svn; this is probably due to the same issue, and indicates it's perhaps a normalization-form issue between SVN and bzr:

bzr: ERROR: Path "I²C" is not unicode normalized

(And then checkout then fails)