nepomukservicestub crashed with SIGSEGV in QThread::isRunning()

[tarabaz]

Binary package hint: kdebase-runtime

Crashed on firefox + adobe flash on youtube.com.
Buggy sound on pulse audio - only osd works fine.
Trying to use alsa - system crash.

ProblemType: Crash
Architecture: i386
CrashCounter: 1
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/nepomukservicestub
NonfreeKernelModules: nvidia
Package: kdebase-runtime 4:4.2.0-0ubuntu1
ProcCmdline: /usr/bin/nepomukservicestub nepomukstrigiservice
ProcEnviron:
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 QThread::isRunning () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/kde4/nepomukstrigiservice.so
 ?? () from /usr/lib/kde4/nepomukstrigiservice.so
 QObjectPrivate::deleteChildren ()
 QObject::~QObject () from /usr/lib/libQtCore.so.4
Title: nepomukservicestub crashed with SIGSEGV in QThread::isRunning()
Uname: Linux 2.6.28-8-generic i686
UserGroups: adm admin audio cdrom dialout games lpadmin plugdev pulse pulse-access pulse-rt sambashare sudo users vboxusers