I think it's related to this bug http://bugs.kde.org/show_bug.cgi?id=158779 I reported this bug to the kubuntu developers and they advised me to only submit the bug upstream at KDE To check if that's the cause you should look for any .desktop files in your /usr/share/applications/ directory that have an invalid MimeType. In my case it was "MimeType=;" in Swiftfox.desktop
-- kbuildsycoca4 aborts after upgrade KDE 4.0.1 -> 4.0.2 https://bugs.launchpad.net/bugs/199145 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs