software-properties-gtk crashed with DBusException in call_blocking(): com.hostname.SoftwareProperties.PermissionDeniedByPolicy: com.hostname.softwareproperties.applychanges

[dino99]

Get it if hitting "escape" instead of filling "password" on Precise i386

oem@ubuntu:~$ software-properties-gtk

Gtk-WARNING **: Locale not supported by C library.
 Using the fallback 'C' locale.

Gtk-WARNING **: Theme parsing error: gtk-widgets.css:5:19: 'background-clip' is not a valid property name
Cannot set locale: unsupported locale setting
gpg: /tmp/tmpBe65oz/trustdb.gpg: trustdb created
WARNING: can not get name for '<CellRendererText object at 0x9448c34 (GtkCellRendererText at 0x9684800)>'
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 806, in on_edit_clicked
    str(dialog.new_source_entry))
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 143, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: software-properties-gtk 0.82
ProcVersionSignature: Ubuntu 3.2.0-5.11-generic-pae 3.2.0-rc5
Uname: Linux 3.2.0-5-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Thu Dec 22 11:37:49 2011
DuplicateOf: https://bugs.launchpad.net/bugs/853028
ExecutablePath: /usr/bin/software-properties-gtk
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk
PythonArgs: ['/usr/bin/software-properties-gtk']
SourcePackage: software-properties
Title: software-properties-gtk crashed with DBusException in call_blocking(): com.hostname.SoftwareProperties.PermissionDeniedByPolicy: com.hostname.softwareproperties.applychanges
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin netdev plugdev sambashare

[dino99 (9d9)]

This system is a Lucid -> Precise dist-upgrade via sources.list

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 828850, so it 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.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.