Be better if you up grade to the latest, just as advice, try to drift to OpenSuse, they run the whole racket and the Shebang for the KED 4.XXX , and you know that Novell and the Crew are in charge!
Best thing be if the Novell put out a Manual for KDE 4! like they had for 3. But I don't who to go!
I have similar problems!
I know 7 is very stable, and where I work they use it! But better to get out of it!