This is caused by python-apt 0.7.100.3ubuntu5 which adds a section to /usr/share/python-apt/templates/Ubuntu.info without a _Description key.
** Changed in: software-properties (Ubuntu) Milestone: None => ubuntu-11.04 ** Changed in: software-properties (Ubuntu) Importance: Medium => High ** Tags added: kubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/768363 Title: Not able to change software origins in software-properties-kde - TypeError: coercing to Unicode: need string or buffer, NoneType found -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs