Application that crashed: systemsettings
Version of the application: 1.0
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 was using digiKam, and I decided to use the Facebook downloader plugin.  To use it, I had to authenticate with the facebook website.  The crash occurred when konqueror had to open to display the facebook login page.

 -- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[KCrash Handler]
#6  0x0311690a in QMutex::lock (this=0xa352e78) at thread/qmutex.cpp:152
#7  0x0320c9d5 in QCoreApplication::postEvent (receiver=<value optimized out>, event=<value optimized out>, priority=<value optimized out>) at kernel/qcoreapplication.cpp:1020
#8  0x0320ccdd in QCoreApplication::postEvent (receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:973
#9  0x0321c405 in QObject::deleteLater (this=<value optimized out>) at kernel/qobject.cpp:2018
#10 0x0199866f in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#11 0x01999c63 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#12 0x03222c0c in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#13 0x03223843 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=<value optimized out>) at kernel/qobject.cpp:3186
#14 0x00157350 in QDBusConnectionInterface::serviceOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:204
#15 0x001576ab in QDBusConnectionInterface::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=2, _a=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:131
#16 0x03222c0c in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#17 0x03223843 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=<value optimized out>) at kernel/qobject.cpp:3186
#18 0x001571f0 in QDBusConnectionInterface::NameOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:232
#19 0x0015773b in QDBusConnectionInterface::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=6, _a=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:135
#20 0x00120a3c in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=<value optimized out>, 
    slotIdx=<value optimized out>) at qdbusintegrator.cpp:891
#21 0x001289a8 in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib/libQtDBus.so.4
#22 0x0321cf96 in QObject::event (this=<value optimized out>, e=<value optimized out>) at kernel/qobject.cpp:1110
#23 0x03930b24 in QApplicationPrivate::notify_helper (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:4065
#24 0x03938281 in QApplication::notify (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:3605
#25 0x043c007b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x0320cd73 in QCoreApplication::notifyInternal (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:610
#27 0x0320d972 in sendEvent (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.h:213
#28 QCoreApplicationPrivate::sendPostedEvents (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.cpp:1247
#29 0x0320db2e in QCoreApplication::sendPostedEvents (receiver=<value optimized out>, event_type=<value optimized out>) at kernel/qcoreapplication.cpp:1140
#30 0x03237f40 in sendPostedEvents () at kernel/qcoreapplication.h:218
#31 postEventSourceDispatch () at kernel/qeventdispatcher_glib.cpp:210
#32 0x00342128 in g_main_dispatch (context=<value optimized out>) at gmain.c:1960
#33 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2513
#34 0x00345a58 in g_main_context_iterate (context=<value optimized out>, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#35 0x00345b84 in IA__g_main_context_iteration (context=0x978a310, may_block=<value optimized out>) at gmain.c:2654
#36 0x03237b6d in QEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#37 0x039d0356 in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#38 0x0320b2aa in QEventLoop::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:149
#39 0x0320b70a in QEventLoop::exec (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:201
#40 0x0320dbf7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#41 0x039309a8 in QApplication::exec () at kernel/qapplication.cpp:3525
#42 0x080526d8 in _start ()

Reported using DrKonqi