Had the same problem on my laptop, but there it disappeared after a reboot. I then also restarted KDE on my "always on" desktop computer, and now the problem disappeared as well. Apparently, a recent upgrade in one or more of the KDE packages requires a restart of KDE, but none was indicated -- still a bug, in my opinion. -- Henk Koster "Behavioral axioms are right, but agents make mistakes." Attributed to L.J. Savage