I am experiencing the same problem in sid, after yesterday's dist-upgrade. I have - systemsettings 5.11.0-1 - version 5.11.0-1 of libkf5* packages - version 5.4.2+dfsg-4 of libqt5* packages - libstdc++6 5.1.1-13 - libc6 2.19-18
System settings has only: - Applications style - Networking (SSL certificates) - Display (crashing) Some functions like antialiasing are clearly not working. The networkmanager applet is not working either. My KDE is quite unusable---finally experienced some unstability in sid :-) Marco