Comment 0 for bug 1074657

When I try to disable or remove something in "other software" tab in software sources dialog, I get an error:

"Authorization failed.": "Software sources can't be changed without permission.".

This problem started in Quantal.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: software-properties-gtk 0.92.9
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sat Nov 3 15:13:39 2012
InstallationDate: Installed on 2010-07-04 (852 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: Upgraded to quantal on 2012-09-28 (35 days ago)