[oneiric] Update Manager crashes when trying to install updates

[Jeremy Bícha]

I believe this crasher bug started this week. I can use Update Manager to view changelogs and available packages but clicking to update or install updates freezes the interface and I get this console error:

$ update-manager
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 472, in _inline_callbacks
    result = gen.throw(result.type, result.value, result.traceback)
  File "/usr/lib/python2.7/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 52, in commit
    downgrade, defer=True)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.TypeError: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 474, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 1055, in _set_property
    self._set_locale(value)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 726, in _set_locale
    (lang, encoding) = locale._parse_localename(locale_str)
  File "/usr/lib/python2.7/locale.py", line 421, in _parse_localename
    code = normalize(localename)
  File "/usr/lib/python2.7/locale.py", line 358, in normalize
    fullname = localename.translate(_ascii_lower_map)
TypeError: character mapping must return integer, None or unicode

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.12
ProcVersionSignature: Ubuntu 3.0.0-8.10-generic 3.0.1
Uname: Linux 3.0.0-8-generic x86_64
Architecture: amd64
Date: Fri Aug 12 04:34:19 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to oneiric on 2011-06-17 (55 days ago)