Version:            (using KDE 4.2.1)
Compiler:          gcc-4.4 
OS:                Linux
Installed from:    Fedora RPMs

After changing some setting in the networkmanager widget, kded4 crashed.
Unfourtunatly I din't have debug symbols installed for that, so I don't know how useful stacktrace is after all:

This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

[Thread debugging using libthread_db enabled]
[New Thread 0xb65d6b70 (LWP 2987)]
0x009f9c4c in nanosleep () from /lib/libc.so.6
[Current thread is 1 (Thread 0xb7f5b780 (LWP 2756))]

Thread 2 (Thread 0xb65d6b70 (LWP 2987)):
#0  0x00a33ff7 in select () from /lib/libc.so.6
#1  0x024ee9f5 in QProcessManager::run (this=0x8ca5550) at io/qprocess_unix.cpp:305
#2  0x0241e4ee in QThreadPrivate::start (arg=0x8ca5550) at thread/qthread_unix.cpp:189
#3  0x00b067d7 in start_thread (arg=0xb65d6b70) at pthread_create.c:297
#4  0x00a3ba0e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb7f5b780 (LWP 2756)):
#0  0x009f9c4c in nanosleep () from /lib/libc.so.6
#1  0x009f9a53 in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:138
#2  0x03e83216 in KCrash::startDrKonqi (argv=0xbfd7f188, argc=17) at /usr/src/debug/kdelibs-4.2.1/kdeui/util/kcrash.cpp:412
#3  0x03e83e59 in KCrash::defaultCrashHandler (sig=11) at /usr/src/debug/kdelibs-4.2.1/kdeui/util/kcrash.cpp:337
#4  <signal handler called>
#5  0x005d9a69 in Wireless80211SecurityWidget::writeConfig() () from /usr/lib/libknmui.so.4
#6  0x004b8c84 in ?? () from /usr/lib/kde4/kded_knetworkmanager.so
#7  0x004b964b in ?? () from /usr/lib/kde4/kded_knetworkmanager.so
#8  0x02527088 in QMetaObject::activate (sender=0x8f92650, from_signal_index=45, to_signal_index=45, argv=0x0) at kernel/qobject.cpp:3069
#9  0x02527d22 in QMetaObject::activate (sender=0x8f92650, m=0x3ff6444, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3143
#10 0x03d804e7 in KDialog::okClicked (this=0x8f92650) at /usr/src/debug/kdelibs-4.2.1/i586-redhat-linux-gnu/kdeui/kdialog.moc:249
#11 0x03d83108 in KDialog::slotButtonClicked (this=0x8f92650, button=4) at /usr/src/debug/kdelibs-4.2.1/kdeui/dialogs/kdialog.cpp:843
#12 0x03d83b52 in KDialog::qt_metacall (this=0x8f92650, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbfd7fba8) at /usr/src/debug/kdelibs-4.2.1/i586-redhat-linux-gnu/kdeui/kdialog.moc:182
#13 0x02527088 in QMetaObject::activate (sender=0x8f697c8, from_signal_index=4, to_signal_index=4, argv=0xbfd7fba8) at kernel/qobject.cpp:3069
#14 0x02527d22 in QMetaObject::activate (sender=0x8f697c8, m=0x2602158, local_signal_index=0, argv=0xbfd7fba8) at kernel/qobject.cpp:3143
#15 0x02529ce3 in QSignalMapper::mapped (this=0x8f697c8, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#16 0x0252a5dd in QSignalMapper::map (this=0x8f697c8, sender=0x9055740) at kernel/qsignalmapper.cpp:266
#17 0x0252a7be in QSignalMapper::map (this=0x8f697c8) at kernel/qsignalmapper.cpp:257
#18 0x0252b01b in QSignalMapper::qt_metacall (this=0x8f697c8, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfd7fd78) at .moc/release-shared/moc_qsignalmapper.cpp:81
#19 0x02527088 in QMetaObject::activate (sender=0x9055740, from_signal_index=29, to_signal_index=30, argv=0xbfd7fd78) at kernel/qobject.cpp:3069
#20 0x02527518 in QMetaObject::activate (sender=0x9055740, m=0x3c44804, from_local_signal_index=2, to_local_signal_index=3, argv=0xbfd7fd78) at kernel/qobject.cpp:3163
#21 0x03a5fad1 in QAbstractButton::clicked (this=0x9055740, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#22 0x03788129 in QAbstractButtonPrivate::emitClicked (this=0x9055360) at widgets/qabstractbutton.cpp:543
#23 0x03789dc4 in QAbstractButtonPrivate::click (this=0x9055360) at widgets/qabstractbutton.cpp:536
#24 0x0378a051 in QAbstractButton::mouseReleaseEvent (this=0x9055740, e=0xbfd80370) at widgets/qabstractbutton.cpp:1115
#25 0x033f8297 in QWidget::event (this=0x9055740, event=0xbfd80370) at kernel/qwidget.cpp:7516
#26 0x03787fbe in QAbstractButton::event (this=0x9055740, e=0x8ee9c00) at widgets/qabstractbutton.cpp:1077
#27 0x03833a7d in QPushButton::event (this=0x9055740, e=0xbfd80370) at widgets/qpushbutton.cpp:662
#28 0x033a2a3c in QApplicationPrivate::notify_helper (this=0x8ca3398, receiver=0x9055740, e=0xbfd80370) at kernel/qapplication.cpp:4084
#29 0x033aa75b in QApplication::notify (this=0xbfd80d10, receiver=0x9055740, e=0xbfd80370) at kernel/qapplication.cpp:3786
#30 0x03e15d0a in KApplication::notify (this=0xbfd80d10, receiver=0x9055740, event=0xbfd80370) at /usr/src/debug/kdelibs-4.2.1/kdeui/kernel/kapplication.cpp:307
#31 0x02510deb in QCoreApplication::notifyInternal (this=0xbfd80d10, receiver=0x9055740, event=0xbfd80370) at kernel/qcoreapplication.cpp:602
#32 0x033a97de in QCoreApplication::sendSpontaneousEvent (event=<value optimized out>, receiver=<value optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:216
#33 QApplicationPrivate::sendMouseEvent (event=<value optimized out>, receiver=<value optimized out>) at kernel/qapplication.cpp:2940
#34 0x03418aa0 in QETWidget::translateMouseEvent (this=0x8f92650, event=0xbfd8096c) at kernel/qapplication_x11.cpp:4425
#35 0x03417f52 in QApplication::x11ProcessEvent (this=0xbfd80d10, event=0xbfd8096c) at kernel/qapplication_x11.cpp:3421
#36 0x03442f42 in x11EventSourceDispatch (s=0x8ca61a8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x05119188 in g_main_dispatch (context=<value optimized out>) at gmain.c:1814
#38 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2367
#39 0x0511c798 in g_main_context_iterate (context=0x8ca5490, block=<value optimized out>, dispatch=1, self=0x8c96e60) at gmain.c:2448
#40 0x0511c90a in IA__g_main_context_iteration (context=0x8ca5490, may_block=1) at gmain.c:2511
#41 0x0253c36c in QEventDispatcherGlib::processEvents (this=0x8c95870, flags={i = 36}) at kernel/qeventdispatcher_glib.cpp:323
#42 0x03442625 in QGuiEventDispatcherGlib::processEvents (this=0x8c95870, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#43 0x0250f379 in QEventLoop::processEvents (this=0xbfd80c64, flags=) at kernel/qeventloop.cpp:149
#44 0x0250f7c2 in QEventLoop::exec (this=0xbfd80c64, flags={i = 0}) at kernel/qeventloop.cpp:200
#45 0x02511b4f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#46 0x033a28b7 in QApplication::exec () at kernel/qapplication.cpp:3553
#47 0x00701660 in kdemain (argc=1, argv=0xbfd80f34) at /usr/src/debug/kdelibs-4.2.1/kded/kded.cpp:937
#48 0x0804868b in main (argc=1, argv=0xbfd80f34) at /usr/src/debug/kdelibs-4.2.1/i586-redhat-linux-gnu/kded/kded4_dummy.cpp:3
Current language:  auto; currently asm
Current language:  auto; currently c