/tmp/ksocket-kevin/klauncher3wah8b.slave-socket

A couple of times over the last two days my KDE desktop on 7.2 has just spontaneously self-destructed and given me a login screen. Looking at the running processes, I find varying amounts (10-20) of variants of the following: kdeinit: kio_http http /tmp/ksocket-kevin/klauncher3wah8b.slave-socket /tmp/ksocket-kevin/konqueroraLEO2b.slave-socket (all one line) The first segment (/tmp/ksocket-kevin/klauncher3wah8b.slave-socket) is the same, but the second segment can differ. I have never noticed these before. Are they supposed to be there? (And if so, what do they refer to?) If they're not supposed to be there, what caused them, and how do I get rid of them? Perplexed ... Kevin