The Gtk and the KDE frontends have exactly the same problem, except the KDE frontend should not crash. See the fix in attachment. Then have a look at https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/769364
The Gtk and the KDE frontends have exactly the same problem, except the KDE frontend should not crash. See the fix in attachment. /bugs.launchpad .net/ubuntu/ +source/ software- properties/ +bug/769364
Then have a look at https:/