"exceptions.UnicodeDecodeError: 'ascii' codec..." during auto upgrade

[Vlekkie]

When I tried to clone(/branch/get) from lp:bzr-visualstudio an on the fly conversion is started from RepositoryFormatKnit1() to RepositoryFormat2a().

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 923, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1123, in run_bzr
  File "bzrlib\commands.pyo", line 691, in run_argv_aliases
  File "bzrlib\commands.pyo", line 710, in run
  File "bzrlib\cleanup.pyo", line 135, in run_simple
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\commands.py", line 788, in run
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\subprocess.py", line 894, in run_subprocess_command
UnicodeDecodeError: 'ascii' codec can't decode byte 0x80 in position 10: ordinal not in range(128)

bzr 2.3.0 on python 2.6.6 (Windows-7-6.1.7600)
arguments: ['C:\\Program Files (x86)\\Bazaar\\bzr.exe', 'qsubprocess', '--bencode', 'l6:branch19:lp:bzr-visualstudio44:C:/Programming/Bazaar/bzr-visualstudio/trunk18:--use-existing-dire']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files (x86)\Bazaar\plugins\bzrtools [2.3.1]
  colo C:\Program Files (x86)\Bazaar\plugins\colo [0.2.1]
  explorer C:\Program Files (x86)\Bazaar\plugins\explorer [1.1.2]
  fastimport C:\Program Files (x86)\Bazaar\plugins\fastimport [0.10.0dev]
  launchpad C:\Program Files (x86)\Bazaar\plugins\launchpad [2.3.0]
  loom C:\Program Files (x86)\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files (x86)\Bazaar\plugins\netrc_credential_store [2.3.0]
  news_merge C:\Program Files (x86)\Bazaar\plugins\news_merge [2.3.0]
  pipeline C:\Program Files (x86)\Bazaar\plugins\pipeline [1.1.0]
  qbzr C:\Program Files (x86)\Bazaar\plugins\qbzr [0.20.0]
  rewrite C:\Program Files (x86)\Bazaar\plugins\rewrite [0.6.2dev]
  svn C:\Program Files (x86)\Bazaar\plugins\svn [1.0.5dev]
  upload C:\Program Files (x86)\Bazaar\plugins\upload [1.0.0]
  xmloutput C:\Program Files (x86)\Bazaar\plugins\xmloutput [0.8.7.dev]

I am a new user of both Launchpad(effectively - ignore account age,silent memeber) and Bazaar, so the possibility of human error is high. If so, corrections are welcome.

[Martin Packman (gz)]

Upgrade to qbzr 0.20.1 to resolve this issue.