Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-14-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Using Microblogging plasmoid, "show friends" checkmark in configuration dialog and clicked ok.  This caused plasma to crash.  It is reproducible.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4839)]

Thread 3 (Thread 0x7fcd00961950 (LWP 4848)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fcd211bad19 in QWaitCondition::wait (this=0x2329280, mutex=0x2329278, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fcd2004481c in QHostInfoAgent::run (this=0x2329260) at kernel/qhostinfo.cpp:260
#3  0x00007fcd211b9d35 in QThreadPrivate::start (arg=0x2329260) at thread/qthread_unix.cpp:188
#4  0x00007fcd1d0b33ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fcd1dc97fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fccfe90f950 (LWP 4852)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007fcd211b9785 in thread_sleep (ti=0x7fccfe90f020) at thread/qthread_unix.cpp:297
#2  0x00007fcd211b98ee in QThread::msleep (msecs=50) at thread/qthread_unix.cpp:323
#3  0x00007fcd015a73ee in Update_Thread::run (this=0x222d1b0) at /home/nos/Desktop/Install/cwp-0.9.4/plasma-cwp-update-thread.cpp:94
#4  0x00007fcd211b9d35 in QThreadPrivate::start (arg=0x222d1b0) at thread/qthread_unix.cpp:188
#5  0x00007fcd1d0b33ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#6  0x00007fcd1dc97fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcd21776750 (LWP 4839)):
[KCrash Handler]
#5  KConfigGroup::writeEntry (this=0x7fff297b44f0, key=0x7fccea069f46 "password", value=@0x7fff297b4460, flags=<value optimized out>) at /usr/include/qt4/QtCore/qshareddata.h:187
#6  0x00007fcd20d7cfcd in KConfigGroup::writeEntry (this=0x7fff297b44f0, key=0x7fccea069f46 "password", value=<value optimized out>, flags=<value optimized out>)
    at /build/buildd/kde4libs-4.3.0/kdecore/config/kconfiggroup.cpp:904
#7  0x00007fccea0616b5 in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#8  0x00007fccea066842 in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#9  0x00007fccea067830 in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#10 0x00007fcd212b8ea2 in QMetaObject::activate (sender=0x550c860, from_signal_index=<value optimized out>, to_signal_index=45, argv=0x7fff297b4470) at kernel/qobject.cpp:3113
#11 0x00007fcd1f8f51a8 in KDialog::slotButtonClicked (this=0x550c860, button=4) at /build/buildd/kde4libs-4.3.0/kdeui/dialogs/kdialog.cpp:854
#12 0x00007fcd1f8f729d in KDialog::qt_metacall (this=0x550c860, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff297b4a60)
    at /build/buildd/kde4libs-4.3.0/obj-x86_64-linux-gnu/kdeui/kdialog.moc:184
#13 0x00007fcd1f9ad2c6 in KPageDialog::qt_metacall (this=0x7fff297b4460, _c=3926302534, _id=695944193, _a=0x7fff297b4470) at /build/buildd/kde4libs-4.3.0/obj-x86_64-linux-gnu/kdeui/kpagedialog.moc:64
#14 0x00007fcd1f8e3f25 in KConfigDialog::qt_metacall (this=0x7fff297b4460, _c=3926302534, _id=695944193, _a=0x7fff297b4470)
    at /build/buildd/kde4libs-4.3.0/obj-x86_64-linux-gnu/kdeui/kconfigdialog.moc:78
#15 0x00007fcd212b8ea2 in QMetaObject::activate (sender=0x5161f08, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x7fff297b4470) at kernel/qobject.cpp:3113
#16 0x00007fcd212bbc3e in QSignalMapper::mapped (this=0x7fff297b4460, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#17 0x00007fcd212bc4e0 in QSignalMapper::map (this=0x5161f08, sender=0x56ada30) at kernel/qsignalmapper.cpp:266
#18 0x00007fcd212bd0d0 in QSignalMapper::qt_metacall (this=0x5161f08, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff297b4be0) at .moc/release-shared/moc_qsignalmapper.cpp:81
#19 0x00007fcd212b8ea2 in QMetaObject::activate (sender=0x56ada30, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x7fff297b4470) at kernel/qobject.cpp:3113
#20 0x00007fcd1ee90e27 in QAbstractButton::clicked (this=0x7fff297b4460, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#21 0x00007fcd1ebeac6b in QAbstractButtonPrivate::emitClicked (this=0x46b1c20) at widgets/qabstractbutton.cpp:543
#22 0x00007fcd1ebec8c2 in QAbstractButtonPrivate::click (this=0x46b1c20) at widgets/qabstractbutton.cpp:536
#23 0x00007fcd1ebecb15 in QAbstractButton::mouseReleaseEvent (this=0x56ada30, e=0x7fff297b53b0) at widgets/qabstractbutton.cpp:1115
#24 0x00007fcd1e8c00bf in QWidget::event (this=0x56ada30, event=0x7fff297b53b0) at kernel/qwidget.cpp:7549
#25 0x00007fcd1e86ef4d in QApplicationPrivate::notify_helper (this=0x1985140, receiver=0x56ada30, e=0x7fff297b53b0) at kernel/qapplication.cpp:4056
#26 0x00007fcd1e8778ea in QApplication::notify (this=<value optimized out>, receiver=0x56ada30, e=0x7fff297b53b0) at kernel/qapplication.cpp:3758
#27 0x00007fcd1f98171b in KApplication::notify (this=0x1944190, receiver=0x56ada30, event=0x7fff297b53b0) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#28 0x00007fcd212a36ac in QCoreApplication::notifyInternal (this=0x1944190, receiver=0x56ada30, event=0x7fff297b53b0) at kernel/qcoreapplication.cpp:610
#29 0x00007fcd1e876b38 in QApplicationPrivate::sendMouseEvent (receiver=0x56ada30, event=0x7fff297b53b0, alienWidget=0x56ada30, nativeWidget=0x550c860, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7fcd1f2a6010) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#30 0x00007fcd1e8e0b19 in QETWidget::translateMouseEvent (this=0x550c860, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#31 0x00007fcd1e8dfb53 in QApplication::x11ProcessEvent (this=0x1944190, event=0x7fff297b6f30) at kernel/qapplication_x11.cpp:3550
#32 0x00007fcd1e908454 in x11EventSourceDispatch (s=0x1988ac0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x00007fcd1d30220a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0x00007fcd1d3058e0 in ?? () from /usr/lib/libglib-2.0.so.0
#35 0x00007fcd1d305a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0x00007fcd212cca8f in QEventDispatcherGlib::processEvents (this=0x1984a30, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#37 0x00007fcd1e907bdf in QGuiEventDispatcherGlib::processEvents (this=0x7fff297b4460, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#38 0x00007fcd212a1f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 695956000}) at kernel/qeventloop.cpp:149
#39 0x00007fcd212a2314 in QEventLoop::exec (this=0x7fff297b7260, flags={i = 695956080}) at kernel/qeventloop.cpp:201
#40 0x00007fcd212a45e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#41 0x00007fcd14eda1eb in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#42 0x0000000000407215 in launch (argc=1, _name=0x1939d28 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x1939d48 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3a1 "0") at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:676
#43 0x0000000000407a38 in handle_launcher_request (sock=8, who=<value optimized out>) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1168
#44 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1361
#45 0x0000000000408b26 in main (argc=2, argv=0x7fff297b8108, envp=0x7fff297b8120) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 203045

Reported using DrKonqi