It's caused by kubuntu_28_fix_sudo.diff in kdelibs which sets KDEROOTHOME to /root if the user id is 0. Is there any reference for what KDEROOTHOME should be set to? I remember looking it up at the time and must have found it should be /root but I could well have made a mistake.
-- KDEROOTHOME set incorrectly; user settings ignored https://launchpad.net/bugs/44920 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs