nepomukservicestub crashed with SIGSEGV in QObject::~QObject()

[Nikolaj]

after the update and reboot an error message appears, with a proposal to send this message

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.8.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-19.30-generic-pae 3.2.11
Uname: Linux 3.2.0-19-generic-pae i686
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Wed Mar 21 01:47:47 2012
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111230)
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcEnviron:
 LANGUAGE=ru_RU
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: kde-runtime
StacktraceTop:
 ?? ()
 QObject::~QObject() () from /usr/lib/i386-linux-gnu/libQtCore.so.4
 QObject::~QObject() () from /usr/lib/i386-linux-gnu/libQtCore.so.4
 ?? ()
Title: nepomukservicestub crashed with SIGSEGV in QObject::~QObject()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 QObject::~QObject (this=0x9f74720, __in_chrg=<optimized out>) at kernel/qobject.cpp:838
 signalSlotLock (o=<optimized out>) at kernel/qobject.cpp:107
 QObject::~QObject (this=0xbfa611bc, __in_chrg=<optimized out>) at kernel/qobject.cpp:907
 ?? ()