Application: systemsettings (1.0)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-23-generic i686
Distribution: Ubuntu 10.04.1 LTS

-- Information about the crash:
First, i started installing the update. While downloading the required packages, I went to the kpackagekit to search for other packages. When I submitted the search, it said : "waiting for other tasks", so i just waited for it. Later, when the update is completed, it crashed.

 -- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[KCrash Handler]
#6  0x0084665b in QObjectPrivate::isSignalConnected (sender=0xa025bc8, m=0x1dbacc4, local_signal_index=11, argv=0xbffcef54) at kernel/qobject_p.h:227
#7  QMetaObject::activate (sender=0xa025bc8, m=0x1dbacc4, local_signal_index=11, argv=0xbffcef54) at kernel/qobject.cpp:3218
#8  0x01d93e19 in PackageKit::Transaction::finished(PackageKit::Transaction::ExitStatus, unsigned int) () from /usr/lib/libpackagekit-qt.so.12
#9  0x01d8e37c in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#10 0x01d90453 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#11 0x00837c9a in QMetaObject::metacall (object=0xa025df8, cl=13, idx=6, argv=0xbffcf0e0) at kernel/qmetaobject.cpp:237
#12 0x008463d5 in QMetaObject::activate (sender=0xa0279f8, m=0x19cc88, local_signal_index=2, argv=0xbffcf0e0) at kernel/qobject.cpp:3293
#13 0x00184d9f in QDBusConnectionInterface::serviceOwnerChanged (this=0xa0279f8, _t1=..., _t2=..., _t3=...) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:210
#14 0x001850c3 in QDBusConnectionInterface::qt_metacall (this=0xa0279f8, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbffcf2b0) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:137
#15 0x00837c9a in QMetaObject::metacall (object=0xa0279f8, cl=13, idx=7, argv=0xbffcf2b0) at kernel/qmetaobject.cpp:237
#16 0x008463d5 in QMetaObject::activate (sender=0xa0279f8, m=0x19cc88, local_signal_index=6, argv=0xbffcf2b0) at kernel/qobject.cpp:3293
#17 0x00184c4f in QDBusConnectionInterface::NameOwnerChanged (this=0xa0279f8, _t1=..., _t2=..., _t3=...) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:238
#18 0x00185153 in QDBusConnectionInterface::qt_metacall (this=0xa0279f8, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbffcf4bc) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:141
#19 0x00145b34 in QDBusConnectionPrivate::deliverCall (this=0xa026048, object=0xa0279f8, msg=..., metaTypes=..., slotIdx=11) at qdbusintegrator.cpp:904
#20 0x00150ea7 in QDBusCallDeliveryEvent::placeMetaCall (this=0xa0e8a50, object=0xa0279f8) at qdbusintegrator_p.h:101
#21 0x008433fe in QObject::event (this=0xa0279f8, e=0xa0e8a50) at kernel/qobject.cpp:1248
#22 0x00f964dc in QApplicationPrivate::notify_helper (this=0x9e04510, receiver=0xa0279f8, e=0xa0e8a50) at kernel/qapplication.cpp:4300
#23 0x00f9d05e in QApplication::notify (this=0xbffcfd8c, receiver=0xa0279f8, e=0xa0e8a50) at kernel/qapplication.cpp:3704
#24 0x004f2f2a in KApplication::notify (this=0xbffcfd8c, receiver=0xa0279f8, event=0xa0e8a50) at ../../kdeui/kernel/kapplication.cpp:302
#25 0x00832a3b in QCoreApplication::notifyInternal (this=0xbffcfd8c, receiver=0xa0279f8, event=0xa0e8a50) at kernel/qcoreapplication.cpp:704
#26 0x00835473 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x9de2ce0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9de2ce0) at kernel/qcoreapplication.cpp:1345
#28 0x008355dd in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#29 0x0085eadf in QCoreApplication::sendPostedEvents (s=0x9e05d90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#30 postEventSourceDispatch (s=0x9e05d90) at kernel/qeventdispatcher_glib.cpp:276
#31 0x073dd5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0x073e12d8 in ?? () from /lib/libglib-2.0.so.0
#33 0x073e14b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0x0085e5d5 in QEventDispatcherGlib::processEvents (this=0x9de29c0, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#35 0x01056135 in QGuiEventDispatcherGlib::processEvents (this=0x9de29c0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00831059 in QEventLoop::processEvents (this=0xbffcfce4, flags=) at kernel/qeventloop.cpp:149
#37 0x008314aa in QEventLoop::exec (this=0xbffcfce4, flags=...) at kernel/qeventloop.cpp:201
#38 0x0083569f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#39 0x00f96577 in QApplication::exec () at kernel/qapplication.cpp:3579
#40 0x08056b5e in _start ()

Reported using DrKonqi