Thanks for connecting this to the other bug. I haven't tried closing drkonqi without resetting kwin, so I will see also if that has any effect. It has happened only twice in the last 2 weeks, and both times were after a reboot (after a system update), so I am wondering if they are chipping away at the problem. Next time it crashes again, I will post again. I have been traveling and I am on my laptop at the moment, so haven't had an opportunity to post and cover this. Just wanted to note this now in order to keep the bug report open.