Was a problem with my /usr/share/python-apt/templates/Ubuntu.info file. It became corrupt when upgrading from Ubuntu 12.04 to 14.04.
** Changed in: software-properties (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1312540 Title: software -properties-kde won't start To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1312540/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs