software-properties-gtk crashed with AttributeError in toggle_source_use(): 'NoneType' object has no attribute 'disabled'

[Marcos K]

This showed up after a reboot (freeze crash)

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: software-properties-gtk 0.81.13.5
ProcVersionSignature: Ubuntu 3.0.0-31.48-generic 3.0.61
Uname: Linux 3.0.0-31-generic i686
ApportVersion: 1.23-0ubuntu4.1
Architecture: i386
Date: Mon Feb 18 15:12:14 2013
ExecutablePath: /usr/bin/software-properties-gtk
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk --open-tab 2
PythonArgs: ['/usr/bin/software-properties-gtk', '--open-tab', '2']
SourcePackage: software-properties
Title: software-properties-gtk crashed with AttributeError in toggle_source_use(): 'NoneType' object has no attribute 'disabled'
UpgradeStatus: Upgraded to oneiric on 2013-02-18 (0 days ago)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #854818, 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.