Oh sorry I did not say how to apply it (also it's not really clean). See the new patch in attachment.
To apply it, execute the following commands from a terminal: $ apt-get source software-properties-kde $ cd software-properties-0.80.8 $ patch -p1 < patch.diff Now execute software-properties-kde locally from this directory: $ kdesudo ./software-properties-kde It should not crash anymore ** Patch added: "kubuntu_01_kde_i18nhelper_none_string.diff" https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/768363/+attachment/2085839/+files/kubuntu_01_kde_i18nhelper_none_string.diff -- 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