As it seems this problem isn't very common? https://bugs.kde.org/show_bug.cgi?id=254373

Konqueror windows are temporarily frozen by Nepomuk (some seconds up to several minutes) after I have downloaded something (even if the download was with firefox it freezes the konqueror window). Konqueror is usable again after virtuoso-t process vanishes from ksysguard - or after short-tempered me interrupted it.

Is there anybody having the same problem? Or is it some misconfiguration on my system (and on the systems of the other two persons who have commented on the bug)? Any ideas how to solve this? Where on my system should I look to get on the right track?

I'm using KDE SC 4.5.2/Debian Sid.

Is Dolphin also affected? What types of files are being downloaded?

No, dolphin doesn't seem to be affected, only konqueror is freezing. By now I have had the freezes after downloading archives like tar.gz and zip, with mp3, pdf, png, jpg.