Bug#567761: Same problem, due to windowmanager
I had the same problem. Checking my .xsession-errors, this was
because both metacity and openbox were being spawned by the
gnome-session in a tight loop. I'll have to go report that separately..
That doesn't seem to be the case in your process list, but it might be
similar, in case it might not be a kdelibs4c2a bug but rather some
other program causing all of the startups. The trick might be to try
to find what's causing them to respawn when you kill them.