Crashes on opening svn working tree os x 10.6

This is the traceback. Looks like I have a Subversion 1.7 or greater working directory. Bazaar does not go up to 1.7 apparently.

bzr: ERROR: subvertpy.SubversionException: ("The path '/Users/blakekl10/Sites/reigning' appears to be part of a Subversion 1.7 or greater\nworking copy. Please upgrade your Subversion client to use this\nworking copy.", 155021)

Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/explorer/lib/explorer.py", line 1518, in callable_with_cleanup
    task_callable()
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/explorer/lib/explorer.py", line 1678, in _open_location_task
    self._do_view_action, self.dry_run)
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/explorer/lib/location.py", line 160, in __init__
    self.reopen_location()
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/explorer/lib/location.py", line 222, in reopen_location
    self.location)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 811, in open_containing_tree_branch_or_repository
    controldir, relpath = klass.open_containing(location)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 732, in open_containing
    return klass.open_containing_from_transport(transport)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 753, in open_containing_from_transport
    result = klass.open_from_transport(a_transport)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 716, in open_from_transport
    find_format, transport, redirected)
  File "/Library/Python/2.6/site-packages/bzrlib/transport/__init__.py", line 1718, in do_catching_redirections
    return action(transport)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 704, in find_format
    probers=probers)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 1149, in find_format
    return prober.probe_transport(transport)
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/svn/__init__.py", line 176, in probe_transport
    version = check_wc(transport.local_abspath('.').encode("utf-8"))
SubversionException: ("The path '/Users/blakekl10/Sites/reigning' appears to be part of a Subversion 1.7 or greater\nworking copy. Please upgrade your Subversion client to use this\nworking copy.", 155021)

bzr 2.5.0 on python 2.6.1 (darwin)
arguments: ['/usr/local/bin/bzr', 'explorer']
encoding: 'utf-8', fsenc: 'utf-8', lang: 'en_US.UTF-8'
plugins:
  bash_completion /Library/Python/2.6/site-packages/bzrlib/plugins/bash_completion [2.5.0]
  bzrtools /Library/Python/2.6/site-packages/bzrlib/plugins/bzrtools [2.5.0]
  changelog_merge /Library/Python/2.6/site-packages/bzrlib/plugins/changelog_merge [2.5.0]
  colo /Library/Python/2.6/site-packages/bzrlib/plugins/colo [0.4.0]
  email /Library/Python/2.6/site-packages/bzrlib/plugins/email [unknown]
  explorer /Library/Python/2.6/site-packages/bzrlib/plugins/explorer [1.2.2]
  fastimport /Library/Python/2.6/site-packages/bzrlib/plugins/fastimport [0.14.0dev]
  git /Library/Python/2.6/site-packages/bzrlib/plugins/git [0.6.7]
  keychain /Library/Python/2.6/site-packages/bzrlib/plugins/keychain [0.1.0]
  launchpad /Library/Python/2.6/site-packages/bzrlib/plugins/launchpad [2.5.0]
  loom /Library/Python/2.6/site-packages/bzrlib/plugins/loom [2.2.1dev]
  netrc_credential_store /Library/Python/2.6/site-packages/bzrlib/plugins/netrc_credential_store [2.5.0]
  news_merge /Library/Python/2.6/site-packages/bzrlib/plugins/news_merge [2.5.0]
  pipeline /Library/Python/2.6/site-packages/bzrlib/plugins/pipeline [1.4.0]
  po_merge /Library/Python/2.6/site-packages/bzrlib/plugins/po_merge [2.5.0]
  qbzr /Library/Python/2.6/site-packages/bzrlib/plugins/qbzr [0.22.1]
  rewrite /Library/Python/2.6/site-packages/bzrlib/plugins/rewrite [0.6.4dev]
  svn /Library/Python/2.6/site-packages/bzrlib/plugins/svn [1.2.1]
  upload /Library/Python/2.6/site-packages/bzrlib/plugins/upload [1.0.1dev]
  weave_fmt /Library/Python/2.6/site-packages/bzrlib/plugins/weave_fmt [2.5.0]
  xmloutput /Library/Python/2.6/site-packages/bzrlib/plugins/xmloutput [0.8.8]