This bug has been fixed, and a gtk2-engines-gtk-qt bug was the cause of it. I'm closing the bug now, but feel free to reopen it if it appears again.
** Changed in: Ubuntu Status: Confirmed => Fix Released -- Installing over fresh kubuntu install breaks everything https://launchpad.net/bugs/50277 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs