As seen at http://bugs.kde.org/show_bug.cgi?id=155429 I deleted ~/.kde4/share/config/kglobalshortcutsrc and then Ctrl+Alt+Backspace Now it is working properly
As seen at http:// bugs.kde. org/show_ bug.cgi? id=155429 share/config/ kglobalshortcut src and then Ctrl+Alt+Backspace
I deleted ~/.kde4/
Now it is working properly