QBzr DiffView crashes on a particular file

[Russell Briggs]

Double-clicking on a file in the Commit window to pop up the diff. Get the follownig trackback straight after the diff window pops up (no diff is shown):

bzr: ERROR: exceptions.IndexError: pop from empty list

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\trace.py", line 321, in reports_exception_decorate
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\diffwindow.py", line 235, in initial_load
  File "bzrlib\cleanup.pyo", line 131, in run
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\diffwindow.py", line 248, in _initial_load
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\diffwindow.py", line 404, in load_diff
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\diffview.py", line 434, in append_diff
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\diffview.py", line 383, in insertIxsWithChangesHighlighted
IndexError: pop from empty list

bzr 2.3.4 on python 2.6.6 (win32)
arguments: ['C:\\Program Files\\Bazaar\\tbzrcommand.exe', '--command=commit', '--dir=X:\\addons-junari']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.3.1]
  colo C:\Program Files\Bazaar\plugins\colo [0.2.1]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.1.4]
  fastimport C:\Program Files\Bazaar\plugins\fastimport [0.10.0]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.3.4]
  loom C:\Program Files\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.3.4]
  news_merge C:\Program Files\Bazaar\plugins\news_merge [2.3.4]
  pipeline C:\Program Files\Bazaar\plugins\pipeline [1.1.0]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.20.1]
  rewrite C:\Program Files\Bazaar\plugins\rewrite [0.6.2dev]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.5dev]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.7.dev]