update-manager crashed with ValueError in /usr/lib/python2.7/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py: bad marshal data (string ref out of range)

[Vadim Kaskov]

Binary package hint: update-manager

Ubuntu 11.04 installed on virtualbox 4

Update-manager dont start

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.145.13
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
Architecture: i386
Date: Sat Feb 5 00:25:08 2011
ExecutablePath: /usr/bin/update-manager
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python2.7 /usr/bin/update-manager
ProcEnviron:
 LC_MESSAGES=ru_UA.utf8
 LANG=ru_UA.UTF-8
 LANGUAGE=ru_UA:ru_UA.UTF-8:ru:en_GB:en
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/update-manager']
SourcePackage: update-manager
Title: update-manager crashed with ValueError in /usr/lib/python2.7/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py: bad marshal data (string ref out of range)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare