software-properties-gtk crashed with dbus.exceptions.DBusException in call_blocking(): org.freedesktop.DBus.Error.Spawn.PermissionsInvalid: The permission of the setuid helper is not correct

After applying recent updates to Saucy I get this error

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: software-properties-gtk 0.92.25
ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
Uname: Linux 3.11.0-4-generic x86_64
ApportVersion: 2.12.1-0ubuntu2
Architecture: amd64
Date: Thu Aug 29 22:33:48 2013
ExecutablePath: /usr/bin/software-properties-gtk
InstallationDate: Installed on 2012-11-02 (300 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
InterpreterPath: /usr/bin/python3.3
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/software-properties-gtk
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/software-properties-gtk']
SourcePackage: software-properties
Title: software-properties-gtk crashed with dbus.exceptions.DBusException in call_blocking(): org.freedesktop.DBus.Error.Spawn.PermissionsInvalid: The permission of the setuid helper is not correct
UpgradeStatus: Upgraded to saucy on 2013-08-14 (15 days ago)
UserGroups: adm backup cdrom dialout dip disk kismet kvm libvirtd lpadmin netdev plugdev sambashare sudo tty video www-data