no buffer space available

on Windows XP, using the 1.6b3 installer.

trying to branch from latest bzr.dev (plus Andrew Bennetts "[MERGE] Remove registrations of defunct HPSS verbs" patch) running on 64bit Ubuntu 8.04.

C:\Documents and Settings\jack\mysql>bzr branch bzr://willster.local.flamingspor
k.com/stew-encrypted-backup
bzr: ERROR: socket.error: (10055, 'No buffer space available')

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 846, in run_bzr_catch_errors
  File "bzrlib\commands.pyo", line 797, in run_bzr
  File "bzrlib\commands.pyo", line 499, in run_argv_aliases
  File "bzrlib\builtins.pyo", line 942, in run
  File "bzrlib\bzrdir.pyo", line 1006, in sprout
  File "bzrlib\repository.pyo", line 929, in fetch
  File "bzrlib\decorators.pyo", line 192, in write_locked
  File "bzrlib\repository.pyo", line 2441, in fetch
  File "bzrlib\fetch.pyo", line 110, in __init__
  File "bzrlib\fetch.pyo", line 140, in __fetch
  File "bzrlib\fetch.pyo", line 166, in _fetch_everything_for_search
  File "bzrlib\repository.pyo", line 1441, in item_keys_introduced_by
  File "bzrlib\repository.pyo", line 1285, in fileids_altered_by_revision_ids
  File "bzrlib\repository.pyo", line 1261, in _find_file_ids_from_xml_inventory_
lines
  File "bzrlib\repository.pyo", line 1201, in _find_text_key_references_from_xml
_inventory_lines
  File "bzrlib\knit.pyo", line 1292, in iter_lines_added_or_present_in_keys
  File "bzrlib\knit.pyo", line 1438, in _read_records_iter
  File "bzrlib\knit.pyo", line 2272, in get_raw_records
  File "bzrlib\pack.pyo", line 253, in iter_records
  File "bzrlib\pack.pyo", line 294, in _read_format
  File "bzrlib\pack.pyo", line 221, in _read_line
  File "bzrlib\pack.pyo", line 185, in readline
  File "bzrlib\pack.pyo", line 172, in _next
  File "bzrlib\transport\remote.pyo", line 336, in _readv
  File "bzrlib\smart\message.pyo", line 280, in read_body_bytes
  File "bzrlib\smart\message.pyo", line 228, in _wait_for_response_end
  File "bzrlib\smart\message.pyo", line 237, in _read_more
  File "bzrlib\smart\medium.pyo", line 401, in read_bytes
  File "bzrlib\smart\medium.pyo", line 781, in _read_bytes
  File "bzrlib\smart\medium.pyo", line 733, in _read_bytes
error: (10055, 'No buffer space available')

bzr 1.6b3 on python 2.5.2 (win32)
arguments: ['bzr', 'branch', 'bzr://willster.local.flamingspork.com/stew-encrypt
ed-backup']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  gtk C:\Documents and Settings\jack\Application Data\bazaar\2.
0\plugins\gtk [0.94.0]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [unknown]
  qbzr C:\Documents and Settings\jack\Application Data\bazaar\2.
0\plugins\qbzr [0.9.1]
*** 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.

C:\Documents and Settings\jack\mysql>