Yesterday I tried, for the first time, to change some settings in QtCurve. After that Kwin, Drkonqi, and other Plasma related applications kept crashing. I had all dependencies installed: Gtk2, Qt4, Qt5 and utensils. I have removed QtCurve for the time being.
When I change the application style back to Fuse or Breeze the system is stable again.
My system us up-to-date: Kernel: 4.7.4-1, Plasma 5.7.5.
Does anybody have the same problem after changing some of the settings in QtCurve?