Bug 206932

Version:           qt-4.5.2-3.fc11.i586 (using KDE 4.3.0)
OS:                Linux
Installed from:    Fedora RPMs

well I found the bug , and hope that can help
when on ~/.kde/share/config/klipperrc

Number of Actions=0

all actions stops ,

when
Number of Actions=1 (or more )

yours pretty menus appears in all cases …

BTW: 
Author: Mark Willson
Comment:
I need an option to disable the automagic built-in actions, not my custom ones. And don't take the pop-up menu away. Need that to stay. Having to go to the tray will largely defeat the convenience of actions, though I can see how the prevalence of the new automagic actions would encourage such a change.

Reference http://dimsuz.wordpress.com/2009/04/01/klipper-updates/

this bug is very annoying when you use to use kplipper and updates kde from 4.2 to 4.3 in middle of great stress. :)