TooManyConcurrentRequests when trying to commit to a network repo with no network connection

This happens when I try to commit to Launchpad on my laptop with no internet connection.

bzr: ERROR: bzrlib.errors.TooManyConcurrentRequests: The medium 'SmartSSHClientMedium(bzr+ssh://<email address hidden>/)' has reached its concurrent request limit. Be sure to finish_writing and finish_reading on the currently open request.

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 853, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1055, in run_bzr
  File "bzrlib\commands.pyo", line 661, in run_argv_aliases
  File "bzrlib\commands.pyo", line 665, in run_direct
  File "bzrlib\cleanup.pyo", line 122, in run_simple
  File "bzrlib\cleanup.pyo", line 156, in _do_with_cleanups
  File "D:\bzr\bzr-windows-installers\build-win32\release\bzr.2.1.0\bzrlib\plugins\qbzr\lib\commands.py", line 788, in run
  File "D:\bzr\bzr-windows-installers\build-win32\release\bzr.2.1.0\bzrlib\plugins\qbzr\lib\subprocess.py", line 786, in run_subprocess_command
  File "bzrlib\commands.pyo", line 1055, in run_bzr
  File "bzrlib\commands.pyo", line 661, in run_argv_aliases
  File "bzrlib\commands.pyo", line 665, in run_direct
  File "bzrlib\cleanup.pyo", line 122, in run_simple
  File "bzrlib\cleanup.pyo", line 156, in _do_with_cleanups
  File "bzrlib\builtins.pyo", line 3138, in run
  File "bzrlib\decorators.pyo", line 194, in write_locked
  File "bzrlib\workingtree_4.pyo", line 197, in commit
  File "bzrlib\decorators.pyo", line 194, in write_locked
  File "bzrlib\mutabletree.pyo", line 225, in commit
  File "bzrlib\commit.pyo", line 257, in commit
  File "bzrlib\cleanup.pyo", line 118, in run
  File "bzrlib\cleanup.pyo", line 156, in _do_with_cleanups
  File "bzrlib\commit.pyo", line 332, in _commit
  File "bzrlib\commit.pyo", line 473, in _check_bound_branch
  File "bzrlib\decorators.pyo", line 140, in read_locked
  File "bzrlib\branch.pyo", line 2381, in get_master_branch
  File "bzrlib\branch.pyo", line 169, in open
  File "bzrlib\bzrdir.pyo", line 843, in open
  File "bzrlib\bzrdir.pyo", line 878, in open_from_transport
  File "bzrlib\bzrdir.pyo", line 2088, in open
  File "bzrlib\bzrdir.pyo", line 3327, in _open
  File "bzrlib\remote.pyo", line 115, in __init__
  File "bzrlib\remote.pyo", line 127, in _probe_bzrdir
  File "bzrlib\remote.pyo", line 134, in _rpc_open_2_1
  File "bzrlib\remote.pyo", line 52, in _call
  File "bzrlib\smart\client.pyo", line 132, in call
  File "bzrlib\smart\client.pyo", line 145, in call_expecting_body
  File "bzrlib\smart\client.pyo", line 90, in _call_and_read_response
  File "bzrlib\smart\client.pyo", line 45, in _send_request
  File "bzrlib\smart\client.pyo", line 115, in _construct_protocol
  File "bzrlib\smart\medium.pyo", line 707, in get_request
  File "bzrlib\smart\medium.pyo", line 916, in __init__
TooManyConcurrentRequests: The medium 'SmartSSHClientMedium(bzr+ssh://<email address hidden>/)' has reached its concurrent request limit. Be sure to finish_writing and finish_reading on the currently open request.

bzr 2.1.0 on python 2.5.4 (Windows-Vista-6.1.7600)
arguments: ['C:\\Program Files (x86)\\Bazaar\\bzr.exe', 'qsubprocess', '--bencode', 'l6:commit2:-m13:not even real9:--exclude63:C:/Users/Stuart/Documents/bzr/addon/gamecorner/goldeen/revealed11:--unchangede']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files (x86)\Bazaar\plugins\bzrtools [2.1.0]
  explorer C:\Program Files (x86)\Bazaar\plugins\explorer [1.0.1]
  launchpad C:\Program Files (x86)\Bazaar\plugins\launchpad [2.1.0]
  netrc_credential_store C:\Program Files (x86)\Bazaar\plugins\netrc_credential_store [2.1.0]
  news_merge C:\Program Files (x86)\Bazaar\plugins\news_merge [2.1.0]
  qbzr C:\Program Files (x86)\Bazaar\plugins\qbzr [0.18.3]
  rebase C:\Program Files (x86)\Bazaar\plugins\rebase [0.5.5]
  svn C:\Program Files (x86)\Bazaar\plugins\svn [1.0.2]
  upload C:\Program Files (x86)\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files (x86)\Bazaar\plugins\xmloutput [0.8.6]

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.