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 2.6.31.9-174.fc12.i686 i686

What I was doing when the application crashed:
I'm using KDE 4.3.4 on Fedora 12. This is a fresh install with current updates. 

In the last three hours of uptime, the reported crash happened three times.
This last time, there was certainly no user interaction that caused the problem. It happend without a visible trigger ("out of nowhere").

 -- Backtrace:
Application: KDE-Dienst (kded4), signal: Segmentation fault
[KCrash Handler]
#6  0x003b99eb in QMutex::lock() () from /usr/lib/libQtCore.so.4
#7  0x004c5e6f in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#8  0x004c6843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#9  0x0459590a in PackageKit::Transaction::finished(PackageKit::Transaction::ExitStatus, unsigned int) () from /usr/lib/libpackagekit-qt.so.12
#10 0x04590b17 in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#11 0x04592113 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#12 0x004c5c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x004c6843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x00165f10 in QDBusConnectionInterface::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#15 0x0016626b in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#16 0x004c5c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x004c6843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x00165db0 in QDBusConnectionInterface::NameOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#19 0x001662fb in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#20 0x0012f5fc in ?? () from /usr/lib/libQtDBus.so.4
#21 0x00137568 in ?? () from /usr/lib/libQtDBus.so.4
#22 0x004bff96 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#23 0x0695db24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x06965281 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x00a9007b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x004afd73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x004b0972 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#28 0x004b0b2e in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#29 0x004daf40 in ?? () from /usr/lib/libQtCore.so.4
#30 0x05169128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x0516ca58 in ?? () from /lib/libglib-2.0.so.0
#32 0x0516cb84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x004dab6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x069fd356 in ?? () from /usr/lib/libQtGui.so.4
#35 0x004ae2aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x004ae70a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x004b0bf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x0695d9a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x005c5815 in kdemain () from /usr/lib/libkdeinit4_kded4.so
#40 0x0804868c in _start ()

Reported using DrKonqi