I've had this problem for more than a year and it's driving me nuts: Every other time I start up Kubuntu, none of the "Global" Keyboard Shortcuts, i.e. things like ALT-TAB to walk through windows, ALT+F2 to start krunner... are working. The "standard" ones (ctrl+z to undo, ctrl+backspace to backwards delete words...) are never an issue.

Loging out and back into KDE almost always fixes the problem. I haven't experienced it in GNOME (though I hardly use it).

I'd appreciate any ideas. Thank you!