nepomukserver crashed with SIGSEGV in deref()

[saleem24]

restarted the computer after uninstalling fglrx.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.8.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu1
Architecture: amd64
Date: Fri Mar 9 15:39:20 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/nepomukserver
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: /usr/bin/nepomukserver
ProcEnviron:
 LANGUAGE=en_IN
 LANG=en_IN.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fcfa78e0bd3 <QHashData::detach_helper2(void (*)(QHashData::Node*, void*), void (*)(QHashData::Node*), int, int)+227>: mov (%rax,%rdx,8),%rbx
 PC (0x7fcfa78e0bd3) ok
 source "(%rax,%rdx,8)" (0x00000041) not located in a known VMA region (needed readable region)!
 destination "%rbx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: kde-runtime
StacktraceTop:
 deref (this=0x7fcfa7d198e0) at /usr/include/qt4/QtCore/qatomic_x86_64.h:133
 ~QString (this=0x1d72148, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qstring.h:880
 ~Area (this=0x1d72130, __in_chrg=<optimized out>) at ../../kdecore/io/kdebug.cpp:203
 ~QHashNode (this=0x1d72120, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qhash.h:254
 QHash<unsigned int, KDebugPrivate::Area>::deleteNode2 (node=0x1d72120) at /usr/include/qt4/QtCore/qhash.h:521
Title: nepomukserver crashed with SIGSEGV in deref()
UpgradeStatus: Upgraded to precise on 2012-03-08 (1 days ago)
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 deref (this=0x7fcfa7d198e0) at /usr/include/qt4/QtCore/qatomic_x86_64.h:133
 ~QString (this=0x1d72148, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qstring.h:880
 ~Area (this=0x1d72130, __in_chrg=<optimized out>) at ../../kdecore/io/kdebug.cpp:203
 ~QHashNode (this=0x1d72120, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qhash.h:254
 QHash<unsigned int, KDebugPrivate::Area>::deleteNode2 (node=0x1d72120) at /usr/include/qt4/QtCore/qhash.h:521