qlog fails to refresh because of TooManyConcurrentRequests error

[Eric]

Systematically when I've had a qlog view open for a while (perhaps an hour) and I try to do a Refresh, it waits for quite a long time then a popup appears with the error "bzr: ERROR: Connection closed: Unexpected end of message. Please check connectivity and permissions, and report a bug if problems persist.". If I then click on Refresh again I get a large popup with the following in it:

bzr: ERROR: bzrlib.errors.TooManyConcurrentRequests: The medium '<bzrlib.smart.medium.SmartTCPClientMedium object at 0x016DED70>' 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 "C:/Program Files/Bazaar/plugins\qbzr\lib\trace.py", line 286, in reports_exception_decorate
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\log.py", line 308, in refresh
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\logwidget.py", line 188, in refresh
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\logwidget.py", line 195, in load
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\loggraphprovider.py", line 437, in load_tags
  File "bzrlib\tag.pyo", line 123, in get_reverse_tag_dict
  File "bzrlib\tag.pyo", line 108, in get_tag_dict
  File "bzrlib\remote.pyo", line 2255, in _get_tags_bytes
  File "bzrlib\remote.pyo", line 2250, in _vfs_get_tags_bytes
  File "bzrlib\branch.pyo", line 235, in _get_tags_bytes
  File "bzrlib\transport\remote.pyo", line 226, in get_bytes
  File "bzrlib\smart\client.pyo", line 142, in call_expecting_body
  File "bzrlib\smart\client.pyo", line 76, in _call_and_read_response
  File "bzrlib\smart\client.pyo", line 42, in _send_request
  File "bzrlib\smart\client.pyo", line 112, in _construct_protocol
  File "bzrlib\smart\medium.pyo", line 699, in get_request
  File "bzrlib\smart\medium.pyo", line 904, in __init__
TooManyConcurrentRequests: The medium '<bzrlib.smart.medium.SmartTCPClientMedium object at 0x016DED70>' has reached its concurrent request limit. Be sure to finish_writing and finish_reading on the currently open request.

bzr 2.0.0 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.exe', 'qlog', 'bzr://picasso.uk.logica.com/FWO_1.0_C_2']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  automirror C:\Program Files\Bazaar\plugins\automirror [0.0.2]
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.0.0]
  explorer C:\Program Files\Bazaar\plugins\explorer [0.8.2]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.0.0]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.0.0]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.15.0]
  rebase C:\Program Files\Bazaar\plugins\rebase [0.5.3]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.0]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.5]