The bug is in fact in the gtk3-engines-oxygen package. Using another theme or purging the package fixes the problem.
** Also affects: oxygen-gtk3 (Ubuntu) Importance: Undecided Status: New ** Changed in: ubuntu-gnome Status: New => Invalid -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to oxygen-gtk3 in Ubuntu. https://bugs.launchpad.net/bugs/1376146 Title: radio buttons, checkboxes cannot be selected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-gnome/+bug/1376146/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs