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.x86_64 x86_64
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
I'm running Fedora 12 x86_64 and when I use KPackageKit to check for system updates, I get a notice about 10 minutes later that KDE Daemon (KDED4) has crashed (SegFault). This has happened several times, so I loaded the necessary debugging packages on Fedora to submit this crash report.
Steps to Reproduce:
1. Open KPackageKit
2. Click on software updates.
3. Click on refresh.
4. After the system checks for updates, close KPackageKit and do something else. (In most cases I opened Mozilla Firefox)
5. Approximately 10 minutes later, a crash report appears. (I am running Yum with yumupdatesd and "updaterefresh" (Minimun time allowed between manual update check requests) is set to the default of 600 sec. (10 minutes).

 -- Backtrace:
Application: KDE Daemon (kded4), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#5  QMutex::lock (this=0x442f454d4f48246f) at thread/qmutex.cpp:152
#6  0x0000003f0833eb72 in QCoreApplication::postEvent (receiver=0x178fa50, event=0x18d7000, priority=0) at kernel/qcoreapplication.cpp:1020
#7  0x0000003c09a1de41 in PackageKit::ClientPrivate::serviceOwnerChanged (this=0x1944700, name=<value optimized out>, oldOnwer=<value optimized out>, newOwner=<value optimized out>)
    at clientprivate.cpp:102
#8  0x0000003c09a1f288 in PackageKit::ClientPrivate::qt_metacall (this=0x1944700, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff98a372c0) at clientprivate.moc:74
#9  0x0000003f0835408c in QMetaObject::activate (sender=0x18c2f20, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff98a372c0) at kernel/qobject.cpp:3112
#10 0x0000003f0a8558cf in QDBusConnectionInterface::serviceOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=...)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:204
#11 0x0000003f0a855b64 in QDBusConnectionInterface::qt_metacall (this=0x18c2f20, _c=InvokeMetaMethod, _id=2, _a=0x7fff98a37540) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:131
#12 0x0000003f0835408c in QMetaObject::activate (sender=0x18c2f20, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff98a37540) at kernel/qobject.cpp:3112
#13 0x0000003f0a8557ff in QDBusConnectionInterface::NameOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=...)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:232
#14 0x0000003f0a855bcc in QDBusConnectionInterface::qt_metacall (this=0x18c2f20, _c=InvokeMetaMethod, _id=6, _a=0x7fff98a37950) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:135
#15 0x0000003f0a822e84 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:891
#16 0x0000003f0a82a61f in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib64/libQtDBus.so.4
#17 0x0000003f0834e401 in QObject::event (this=0x18c2f20, e=0x186b950) at kernel/qobject.cpp:1110
#18 0x00000033a8f8f65c in QApplicationPrivate::notify_helper (this=0x179c4d0, receiver=0x18c2f20, e=0x186b950) at kernel/qapplication.cpp:4065
#19 0x00000033a8f968ce in QApplication::notify (this=<value optimized out>, receiver=0x18c2f20, e=0x186b950) at kernel/qapplication.cpp:4030
#20 0x00000033aa411a66 in KApplication::notify (this=0x7fff98a382f0, receiver=0x18c2f20, event=0x186b950) at /usr/src/debug/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#21 0x0000003f0833ee6c in QCoreApplication::notifyInternal (this=0x7fff98a382f0, receiver=0x18c2f20, event=0x186b950) at kernel/qcoreapplication.cpp:610
#22 0x0000003f0833fa42 in sendEvent (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.h:213
#23 QCoreApplicationPrivate::sendPostedEvents (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.cpp:1247
#24 0x0000003f08367573 in sendPostedEvents () at kernel/qcoreapplication.h:218
#25 postEventSourceDispatch () at kernel/qeventdispatcher_glib.cpp:210
#26 0x0000003efc23922e in g_main_dispatch (context=<value optimized out>) at gmain.c:1960
#27 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2513
#28 0x0000003efc23cc18 in g_main_context_iterate (context=0x179ed20, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#29 0x0000003efc23cd3a in IA__g_main_context_iteration (context=0x179ed20, may_block=1) at gmain.c:2654
#30 0x0000003f083671e6 in QEventDispatcherGlib::processEvents (this=0x17727b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#31 0x00000033a9021ffe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#32 0x0000003f0833d772 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#33 0x0000003f0833db44 in QEventLoop::exec (this=0x7fff98a38240, flags=...) at kernel/qeventloop.cpp:201
#34 0x0000003f0833fcd9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#35 0x00000033a9a0b6eb in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdelibs-4.3.4/kded/kded.cpp:936
#36 0x0000003ef761eb1d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=<value optimized out>) at libc-start.c:226
#37 0x0000000000400709 in _start ()

Reported using DrKonqi