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