1.9rc1 win32 standalone: file missing: libsvn_client-1.dll

After installing the Windows standalone of 1.9rc1 with default options, every call of bzr at the command line will produce a windows error: bzr.exe - component not found: Application could not be started because libsvn_client-1.dll is missing (translated from german).
I don't have this problem with 1.8-lite (obviously due to missing svn :)

0.032 bzr arguments: [u'version']
0.032 looking for plugins in C:/Dokumente und Einstellungen/Alex/Anwendungsdaten/bazaar/2.0/plugins
0.032 looking for plugins in C:/Programme/Bazaar1.9/plugins
[ 1632] 2008-11-04 23:30:38.655 WARNING: Unable to load bzr-svn extensions - did you build it?
[ 1632] 2008-11-04 23:30:38.655 WARNING: DLL load failed: Das angegebene Modul wurde nicht gefunden.
[ 1632] 2008-11-04 23:30:38.655 WARNING: Unable to load plugin u'svn' from u'C:/Programme/Bazaar1.9/plugins'
1.563 Traceback (most recent call last):
  File "bzrlib\plugin.pyo", line 218, in load_from_dir
  File "<string>", line 1, in <module>
  File "C:/Programme/Bazaar1.9/plugins\svn\__init__.py", line 109, in <module>
  File "C:/Programme/Bazaar1.9/plugins\svn\__init__.py", line 74, in check_subversion_version
ImportError: DLL load failed: Das angegebene Modul wurde nicht gefunden.

1.610 encoding stdout as sys.stdout encoding 'cp850'
1.625 return code 0