suvertpy craches bzr update on windows

[Timmie]

I installed 1.22-1 Standalone for Windows.

Here is what appened at a ```bzr update``

Code::

bzr: ERROR: exceptions.ImportError: bzr-svn: unable to find subvertpy. Please in
stall from http://launchpad.net/subvertpy.

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 896, in run_bzr_catch_errors
  File "bzrlib\commands.pyo", line 842, in run_bzr
  File "bzrlib\commands.pyo", line 542, in run_argv_aliases
  File "bzrlib\builtins.pyo", line 1190, in run
  File "bzrlib\decorators.pyo", line 138, in read_locked
  File "bzrlib\branch.pyo", line 2155, in get_master_branch
  File "bzrlib\branch.pyo", line 126, in open
  File "bzrlib\bzrdir.pyo", line 1573, in open_branch
  File "bzrlib\branch.pyo", line 1430, in open
  File "bzrlib\bzrdir.pyo", line 633, in find_repository
  File "bzrlib\bzrdir.pyo", line 609, in _find_containing
  File "bzrlib\bzrdir.pyo", line 865, in open_containing_from_transport
  File "bzrlib\bzrdir.pyo", line 819, in open_from_transport
  File "bzrlib\transport\__init__.pyo", line 1680, in do_catching_redirections
  File "bzrlib\bzrdir.pyo", line 806, in find_format
  File "bzrlib\bzrdir.pyo", line 1645, in find_format
  File "C:/Programme/Bazaar/plugins\svn\format.py", line 86, in probe_transport
  File "C:/Programme/Bazaar/plugins\svn\format.py", line 56, in _check_versions
  File "C:/Programme/Bazaar/plugins\svn\__init__.py", line 103, in lazy_check_ve
rsions
  File "C:/Programme/Bazaar/plugins\svn\__init__.py", line 86, in init_subvertpy

ImportError: bzr-svn: unable to find subvertpy. Please install from http://launc
hpad.net/subvertpy.

bzr 1.12 on python 2.5.2 (win32)
arguments: ['bzr', 'update']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Programme\Bazaar\plugins\bzrtools [1.12]
  launchpad C:\Programme\Bazaar\plugins\launchpad [unknown]
  netrc_credential_store C:\Programme\Bazaar\plugins\netrc_credential_store [unk
nown]
  qbzr C:\Programme\Bazaar\plugins\qbzr [0.9.8]
  svn C:\Programme\Bazaar\plugins\svn [0.5]
*** 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.