Network outage results in unrecoverable interruption during svn+http:// branch

This is a large (publically available) SVN repository with multiple projects stretched over 5600+ revisions.
Fails but not predictably. Branch is left in a state where entering it and trying a pull results in...
bzr: ERROR: Not a branch: "D:/src/v3-generator/.bzr/branch/".

Pulling the network card (pcmcia wireless) has the same results ; this is probably due to wireless card dropping the connection. Interruption of a potentially long operation should be more recoverable.

D:\src>bzr branch http://svn.hl7.nscee.edu/svn/hl7v3/v3-generator/trunk v3-generator
Initialising Subversion metadata cache in d:/Documents and Settings/adwi2/Application Data/bazaar/2.0\svn-cache\84b5e2f8
-9060-435c-adf6-b4947a17f322\cache-v3
bzr: ERROR: libsvn._core.SubversionException: ("REPORT request failed on '/svn/hl7v3/!svn/vcc/default'", 175002)

Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\bzrlib\commands.py", line 806, in run_bzr_catch_errors
    return run_bzr(argv)
  File "C:\Python25\Lib\site-packages\bzrlib\commands.py", line 762, in run_bzr
    ret = run(*run_argv)
  File "C:\Python25\Lib\site-packages\bzrlib\commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "C:\Python25\Lib\site-packages\bzrlib\builtins.py", line 907, in run
    accelerator_tree=accelerator_tree)
  File "d:/Documents and Settings/adwi2/Application Data/bazaar/2.0/plugins\svn\remote.py", line 77, in sprout
    result_repo = repo.clone(result, revision_id)
  File "C:\Python25\Lib\site-packages\bzrlib\decorators.py", line 127, in read_locked
    return unbound(self, *args, **kwargs)
  File "C:\Python25\Lib\site-packages\bzrlib\repository.py", line 964, in clone
    self.copy_content_into(dest_repo, revision_id)
  File "C:\Python25\Lib\site-packages\bzrlib\repository.py", line 874, in copy_content_into
    return InterRepository.get(self, destination).copy_content(revision_id)
  File "d:/Documents and Settings/adwi2/Application Data/bazaar/2.0/plugins\svn\fetch.py", line 595, in copy_content
    self.fetch(revision_id, pb, find_ghosts=False)
  File "d:/Documents and Settings/adwi2/Application Data/bazaar/2.0/plugins\svn\fetch.py", line 716, in fetch
    self._fetch_switch(needed, pb, lhs_parent)
  File "d:/Documents and Settings/adwi2/Application Data/bazaar/2.0/plugins\svn\fetch.py", line 673, in _fetch_switch
    reporter.finish_report(pool)
  File "d:/Documents and Settings/adwi2/Application Data/bazaar/2.0/plugins\svn\errors.py", line 112, in convert
    raise convert_error(e)
SubversionException: ("REPORT request failed on '/svn/hl7v3/!svn/vcc/default'", 175002)

bzr 1.1.0 on python 2.5.1.final.0 (win32)
arguments: ['C:\\Python25\\Scripts\\bzr', 'branch', 'http://svn.hl7.nscee.edu/svn/hl7v3/v3-generator/trunk', 'v3-generat
or']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  launchpad C:\Python25\lib\site-packages\bzrlib\plugins\launchpad [unknown]
  multiparent C:\Python25\lib\site-packages\bzrlib\plugins\multiparent.pyc [unknown]
  svn d:\Documents and Settings\adwi2\Application Data\bazaar\2.0\plugins\svn [0.4.7]
*** Bazaar has encountered an internal error.