I logged into KDE. I had indexing of files and email enabled.
ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
Date: Wed Apr 4 11:06:52 2012
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcEnviron:
PATH=(custom, user)
LANG=da_DK.UTF-8
SHELL=/bin/bash
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: kde-runtime
StacktraceTop: ?? ()
Title: nepomukservicestub crashed with SIGSEGV
UpgradeStatus: Upgraded to precise on 2012-03-09 (25 days ago)
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare
StacktraceTop: ?? ()