Yesterday I have installed all the latest files. And with me the problem is gone
E.g. I have done an update to get the latest rpm packages.
This also included a fix for X11, maybe the problem might be in your older version.
Please update the rpm packages using Suse YOU. Or else you can use this perfect tool:
This is an easy program and replaces SuSe YOU.
Else you might try to install the latest kernel version and the latest KDE 3.2.3.
Good luck with it,