OK, I solved the problem. Deleting the kde-* ksocket-* and mcop-* directories in /tmp did the trick.
Xaveer Leijtens wrote on 02-Apr-2001: > I've been running KDE 2.1 without much problems, but about a week ago an > upgrade (to 2.1.1?) stopped Konqueror and (most of) kpanel from working. > The message I get after startup is: > > Could not start process > Unable to create io-slave: > klauncher said: > Unknown protocol 'file' > > and other messages pop up: > > No mime types installed! > > This looks like an essential part missing... Does anyone have an idea on > how to fix this?

