nepomukservicestub crashed with SIGSEGV in QMutex::lock()

[Claude Pichette]

Doing basic pref setups....icons,colors etc...

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.8.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
Date: Sun Mar 25 08:43:44 2012
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120228.1)
ProcCmdline: /usr/bin/nepomukservicestub nepomukfilewatch
ProcEnviron:
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: kde-runtime
Title: nepomukservicestub crashed with SIGSEGV in QMutex::lock()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 QMutex::lock (this=0x2764b28) at thread/qmutex.cpp:153
 lockInline (this=<optimized out>) at /usr/include/qt4/QtCore/qmutex.h:198
 QMutexLocker (m=<optimized out>, this=0x7f66c77fd730) at /usr/include/qt4/QtCore/qmutex.h:109
 Soprano::Error::ErrorCache::clearError (this=0x7f66b80013d0) at ../../soprano/error.cpp:238
 Soprano::Error::ErrorCache::setError (this=0x7f66b80013d0, error=...) at ../../soprano/error.cpp:225