update-manager crashed with SystemError in mark_install(): E:Unable to correct problems, you have held broken packages.

[Id2ndR]

Apport create this bug repport after several clik to uncheck packages.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.19
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CheckboxSubmission: 1085bd3e1d3dc5fdefc443fc7f3687c2
CheckboxSystem: f78c696d4c0399fa91f9da1b540d7fd0
Date: Sat Oct 1 11:03:32 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/update-manager
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110901)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/update-manager
ProcEnviron:
 SHELL=/bin/bash
 LANG=fr_FR.UTF-8
PythonArgs: ['/usr/bin/update-manager']
SourcePackage: update-manager
Title: update-manager crashed with SystemError in mark_install(): E:Unable to correct problems, you have held broken packages.
UpgradeStatus: Upgraded to oneiric on 2011-09-13 (17 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #768007, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.