If the damage is limited to one user, you can delete the files in the users .kde directory. Then when you restart X, it will rebuild those config files with default values automagically for you. If you whacked a whole bunch of stuff (like problems w/ all the users or system file damage) then I'd re-install as per jailbait's advice.
If you want to switch back to gnome from KDE as well, then delete the .Xclients and .Xclients-default files too.
Last edited by Capt_Caveman; 09-26-2003 at 12:41 AM.