bzr: ERROR: exceptions.KeyError: u'C:/some/path'

bzr: ERROR: exceptions.KeyError: u'C:/Development Tools/PXDK_Beta1/PXDKr2/PlugIns/Scarborough_Fair'

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\explorer\lib\explorer.py", line 1641, in do_close
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location_viewer.py", line 166, in close_current
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location_selector.py", line 125, in close_current
KeyError: u'C:/Development Tools/PXDK_Beta1/PXDKr2/PlugIns/Scarborough_Fair'

bzr 2.1.0 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.exe', 'explorer']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.1.0]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.0.1]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.1.0]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.1.0]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.18.1]
  rebase C:\Program Files\Bazaar\plugins\rebase [0.5.5]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.2]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.6]