No response to Ctrl-Alt-Esc

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http://forums.opensuse.org – Was using 10.3. Did a fresh install of 11.2. Using KDE. In 10.3 when an application misbehaved and froze I could press Ctrl-Alt-Esc and then click on the app to force it closed. This feature is not working in my installation of 11.2. Ctrl-Alt-Backspace would crash the desktop allowing me to log in again. This doesn't work for me any more either. Is there a something I missed? Is it a KDE thing or is it somewhere else? (Distributions)