SuSE, while logged in using KDE as a desktop???
my experience with KDE is great except for one peeve (arts) it is a sound server that can cause problems - (i install kde without arts), as it can cause logoff and reboot problems while logged in to KDE...
open the control center and disable the sound server, this should fix your problem...
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there is a project i been watching and hopeing it takes off and makes progress called SimpleKDE
http://www.simplekde.org/ (a lightweight kde fork (sortof))