Version:            (using KDE 4.2.90)
OS:                Linux
Installed from:    Fedora RPMs

Kded crashes frequently on my system somewhere in packagekit-code:

Application: KDE Daemon (kded4), signal: Aborted
[KCrash Handler]
#6  0x002d8422 in __kernel_vsyscall ()
#7  0x00b657c1 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0x00b67092 in *__GI_abort () at abort.c:88
#9  0x0034e87c in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4
#10 0x0034e95e in qFatal(char const*, ...) () from /usr/lib/libQtCore.so.4
#11 0x0034ea55 in qt_assert(char const*, char const*, int) () from /usr/lib/libQtCore.so.4
#12 0x023258bc in QString::operator[] (i=<value optimized out>, this=<value optimized out>) at /usr/include/QtCore/qstring.h:871
#13 PackageKit::Util::enumToString<PackageKit::Client> (i=<value optimized out>, this=<value optimized out>) at util.h:111
#14 0x0231b1a3 in PackageKit::Client::getTimeSinceAction (this=0xa00ab50, action=12) at client.cpp:134
#15 0x0641580e in KPackageKitD::init (this=0x9fff160) at /usr/src/debug/kpackagekit-0.4.0/KPackageKitD/kpackagekitd.cpp:74
#16 0x06414de3 in KPackageKitD::qt_metacall (this=0x9fff160, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfe04b2c)
    at /usr/src/debug/kpackagekit-0.4.0/i586-redhat-linux-gnu/KPackageKitD/moc_kpackagekitd.cpp:72
#17 0x0045c963 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x0045d5b2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#19 0x00496c27 in QTimer::timeout() () from /usr/lib/libQtCore.so.4
#20 0x0046207e in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQtCore.so.4
#21 0x004569cf in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#22 0x00e09444 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00e10abe in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x02bab3da in KApplication::notify (this=0xbfe05330, receiver=0x9fff1d0, event=0xbfe04fc0) at /usr/src/debug/kdelibs-4.2.90/kdeui/kernel/kapplication.cpp:302
#25 0x0044697b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#26 0x00473cfe in ?? () from /usr/lib/libQtCore.so.4
#27 0x00471730 in ?? () from /usr/lib/libQtCore.so.4
#28 0x00957558 in g_main_dispatch (context=<value optimized out>) at gmain.c:1814
#29 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2367
#30 0x0095aaf0 in g_main_context_iterate (context=0x9e3ce98, block=<value optimized out>, dispatch=1, self=0x9e35e50) at gmain.c:2445
#31 0x0095ac23 in IA__g_main_context_iteration (context=0x9e3ce98, may_block=1) at gmain.c:2508
#32 0x0047167c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0x00ea8305 in ?? () from /usr/lib/libQtGui.so.4
#34 0x00444f69 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0x004453b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x0044770f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#37 0x00e092c7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#38 0x00aa796e in kdemain (argc=1, argv=0xbfe05554) at /usr/src/debug/kdelibs-4.2.90/kded/kded.cpp:938
#39 0x0804868b in main (argc=1, argv=0xbfe05554) at /usr/src/debug/kdelibs-4.2.90/i586-redhat-linux-gnu/kded/kded4_dummy.cpp:3