Application that crashed: kded4
Version of the application: $Id: kded.cpp 1031638 2009-10-05 16:59:11Z lunakl $
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-174.2.3.fc12.i686 i686

What I was doing when the application crashed:
i just changed between windows, automatically connected to internet and then crashed 
i'd already opened firefox and kmail

 -- Backtrace:
Application: KDE Daemon (kded4), signal: Segmentation fault
[KCrash Handler]
#6  0x05322908 in QMutex::lock() () from /usr/lib/libQtCore.so.4
#7  0x054189d5 in QCoreApplication::postEvent(QObject*, QEvent*, int) () from /usr/lib/libQtCore.so.4
#8  0x05418cdd in QCoreApplication::postEvent(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#9  0x05428405 in QObject::deleteLater() () from /usr/lib/libQtCore.so.4
#10 0x06bbbb1f in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#11 0x06bbd113 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#12 0x0542ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x0542f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x05574350 in QDBusConnectionInterface::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#15 0x055746ab in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#16 0x0542ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x0542f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x055741f0 in QDBusConnectionInterface::NameOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#19 0x0557473b in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#20 0x0553da3c in ?? () from /usr/lib/libQtDBus.so.4
#21 0x055459a8 in ?? () from /usr/lib/libQtDBus.so.4
#22 0x05428f96 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#23 0x05a94b24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x05a9c281 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x0652407b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x05418d73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x05419972 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#28 0x05419b2e in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#29 0x05443f40 in ?? () from /usr/lib/libQtCore.so.4
#30 0x00270128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x00273a58 in ?? () from /lib/libglib-2.0.so.0
#32 0x00273b84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x05443b6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x05b34356 in ?? () from /usr/lib/libQtGui.so.4
#35 0x054172aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x0541770a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x05419bf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x05a949a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x00823815 in kdemain () from /usr/lib/libkdeinit4_kded4.so
#40 0x0804868c in _start ()

This bug may be a duplicate of or related to bug 224284

Reported using DrKonqi