For some reason, my Print screen hotkey has stopped working. It used to open kde4-ksnapshot (back in KDE 4.0.4), now nothing at all happens when I press the Print screen, Alt-Print screen, or CTRL-Print screen. Nothing at all. Ksnapshot is installed though, and also fully working.
I checked the shortcuts & hotkeys in system settings and they seem to be correct. What happened there?