Application that crashed: kpackagekit
Version of the application: 0.5.4
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-174.2.3.fc12.i686 i686
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
KDE crashes sometimes, dont know the reason

 -- Backtrace:
Application: KPackageKit (kpackagekit), signal: Segmentation fault
[KCrash Handler]
#6  0x05e1190a in QMutex::lock() () from /usr/lib/libQtCore.so.4
#7  0x05f079d5 in QCoreApplication::postEvent(QObject*, QEvent*, int) () from /usr/lib/libQtCore.so.4
#8  0x05f07cdd in QCoreApplication::postEvent(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#9  0x05f17405 in QObject::deleteLater() () from /usr/lib/libQtCore.so.4
#10 0x07839b1f in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#11 0x0783b113 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#12 0x05f1dc0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x05f1e843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x07802350 in QDBusConnectionInterface::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#15 0x078026ab in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#16 0x05f1dc0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x05f1e843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x078021f0 in QDBusConnectionInterface::NameOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libQtDBus.so.4
#19 0x0780273b in QDBusConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtDBus.so.4
#20 0x077cba3c in ?? () from /usr/lib/libQtDBus.so.4
#21 0x077d39a8 in ?? () from /usr/lib/libQtDBus.so.4
#22 0x05f17f96 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#23 0x4148fb24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x41497281 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x035f98cb in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x05f07d73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x05f08972 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#28 0x05f08b2e in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#29 0x05f32f40 in ?? () from /usr/lib/libQtCore.so.4
#30 0x00956f88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x0095a8b8 in ?? () from /lib/libglib-2.0.so.0
#32 0x0095a9e4 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x05f32b6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x4152f356 in ?? () from /usr/lib/libQtGui.so.4
#35 0x05f062aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x05f0670a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x05f08bf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x4148f9a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x0804cd6b in _start ()

Reported using DrKonqi