I can confirm that Nepomuk is sort of running on my machine. I was actually trying to get it to work--I don't need to disable it. Is there anything I can get that's particularly useful when I experience this crash again? I already installed the debug packages, and sent in a crash dump . . . any specific logs, etc? Anything diagnostic I can contribute?

oriojshI experiencing crashes of Dolphin with Nepomuk enabled with similar backtraces mostly after fetching file previews in Dolphin window. Files could be of any type (but with previews) such as video, text and so on

I confirm this is Nepomuk related problem, as soon as I disabled Nepomuk all dolphin crashes/seqfaults stopped.since then I didn't have a single crash, perfectly stable hence the workaround of bug is to disable Nepomuk and keep it disable untill this bug get fixed. Here how to disable Nepomuk: * Click on K Menu --> Computer --> System Settings --> Advanced Tab --> Desktop Search. * Uncheck both the check boxed to disanle Nepomuk I hope this bug gets fixed soon, if devs need more information. I am happy to provide that.