bzr unusable after install on Mac OSX 10.8

After installing either 2.5.0 or 2.5.1 from the .dmg files, running bzr results the error below. I was able to fix the problem by installing Subversion directly and symlinking from /usr/lib to the install directory /opt/subversion/lib.

bzr: ERROR: exceptions.ImportError: Unable to load subvertpy extensions: dlopen(/Library/Python/2.6/site-packages/subvertpy/client.so, 2): Library not loaded: /usr/lib/libsvn_client-1.0.dylib
  Referenced from: /Library/Python/2.6/site-packages/subvertpy/client.so
  Reason: image not found

Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 920, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1131, in run_bzr
    ret = run(*run_argv)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 695, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1148, in ignore_pipe
    result = func(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/builtins.py", line 1824, in run
    verbose=noise_level, outfile=self.outf)
  File "/Library/Python/2.6/site-packages/bzrlib/info.py", line 378, in show_bzrdir_info
    outfile)
  File "/Library/Python/2.6/site-packages/bzrlib/info.py", line 394, in show_component_info
    format = describe_format(control, repository, branch, working)
  File "/Library/Python/2.6/site-packages/bzrlib/info.py", line 499, in describe_format
    format = controldir.format_registry.make_bzrdir(key)
  File "/Library/Python/2.6/site-packages/bzrlib/controldir.py", line 1346, in make_bzrdir
    return self.get(key)()
  File "/Library/Python/2.6/site-packages/bzrlib/registry.py", line 177, in get
    return self._dict[self._get_key_or_default(key)].get_obj()
  File "/Library/Python/2.6/site-packages/bzrlib/registry.py", line 74, in get_obj
    self._obj = get_named_object(self._module_name, self._member_name)
  File "/Library/Python/2.6/site-packages/bzrlib/pyutils.py", line 51, in get_named_object
    obj = __import__(module_name, {}, {}, from_list)
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/svn/workingtree.py", line 26, in <module>
    import subvertpy
  File "/Library/Python/2.6/site-packages/subvertpy/__init__.py", line 130, in <module>
    raise ImportError("Unable to load subvertpy extensions: %s" % e)
ImportError: Unable to load subvertpy extensions: dlopen(/Library/Python/2.6/site-packages/subvertpy/client.so, 2): Library not loaded: /usr/lib/libsvn_client-1.0.dylib
  Referenced from: /Library/Python/2.6/site-packages/subvertpy/client.so
  Reason: image not found

bzr 2.5.0 on python 2.6.7 (Darwin-12.2.0-x86_64-i386-64bit)
arguments: ['/usr/local/bin/bzr', 'info',
    '/Users/adam/Development/Code/release/']
plugins: bash_completion[2.5.0], bzrtools[2.5.0], changelog_merge[2.5.0],
    colo[0.4.0], email[unknown], explorer[1.2.2], fastimport[0.14.0dev],
    git[0.6.7], keychain[0.1.0], launchpad[2.5.0], loom[2.2.1dev],
    netrc_credential_store[2.5.0], news_merge[2.5.0], pipeline[1.4.0],
    po_merge[2.5.0], qbzr[0.22.1], rewrite[0.6.4dev], svn[1.2.1],
    upload[1.0.1dev], weave_fmt[2.5.0], xmloutput[0.8.8]
encoding: 'utf-8', fsenc: 'utf-8', lang: 'en_CA.UTF-8'