Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-14-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I noticed that the micro blogging plasma widget wasn't showing my friend posts for Twitter.  Opened the settings dialog for the widget.  It has Show Friends enabled.  I tried unselecting Show Friends.  When I clicked on OK, Plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 17286)]

Thread 2 (Thread 0xa811ab90 (LWP 17287)):
#0  0xb7f27430 in __kernel_vsyscall ()
#1  0xb63e40e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb65c42ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7d1a9b2 in QWaitCondition::wait (this=0x9a1ab58, mutex=0x9a1ab54, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb7653152 in QHostInfoAgent::run (this=0x9a1ab48) at kernel/qhostinfo.cpp:260
#5  0xb7d1996e in QThreadPrivate::start (arg=0x9a1ab48) at thread/qthread_unix.cpp:189
#6  0xb63e04ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb65b549e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5eeea10 (LWP 17286)):
[KCrash Handler]
#6  KConfigGroup::writeEntry (this=0xbf840f04, key=0xa82c6486 "password", value=@0xbf840e7c, flags={i = -1081864584}) at /usr/include/qt4/QtCore/qshareddata.h:187
#7  0xb7b03a7d in KConfigGroup::writeEntry (this=0xbf840f04, key=0xa82c6486 "password", value=@0x97d1bd0, flags={i = -1081864412})
    at /build/buildd/kde4libs-4.2.98a/kdecore/config/kconfiggroup.cpp:904
#8  0xa82bd09c in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#9  0xa82c27c2 in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#10 0xa82c38f3 in ?? () from /usr/lib/kde4/plasma_applet_microblog.so
#11 0xb7e23ca8 in QMetaObject::activate (sender=0xa18a920, from_signal_index=45, to_signal_index=45, argv=0x0) at kernel/qobject.cpp:3069
#12 0xb7e24932 in QMetaObject::activate (sender=0xa18a920, m=0xb757d144, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3143
#13 0xb733b3d7 in KDialog::okClicked (this=0xa18a920) at /build/buildd/kde4libs-4.2.98a/obj-i486-linux-gnu/kdeui/kdialog.moc:252
#14 0xb733dc18 in KDialog::slotButtonClicked (this=0xa18a920, button=4) at /build/buildd/kde4libs-4.2.98a/kdeui/dialogs/kdialog.cpp:854
#15 0xb733fe2c in KDialog::qt_metacall (this=0xa18a920, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbf84129c) at /build/buildd/kde4libs-4.2.98a/obj-i486-linux-gnu/kdeui/kdialog.moc:184
#16 0xb740667a in KPageDialog::qt_metacall (this=0xa18a920, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbf84129c) at /build/buildd/kde4libs-4.2.98a/obj-i486-linux-gnu/kdeui/kpagedialog.moc:64
#17 0xb732a91a in KConfigDialog::qt_metacall (this=0xa18a920, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbf84129c) at /build/buildd/kde4libs-4.2.98a/obj-i486-linux-gnu/kdeui/kconfigdialog.moc:78
#18 0xb7e23ca8 in QMetaObject::activate (sender=0xacf31e8, from_signal_index=4, to_signal_index=4, argv=0xbf84129c) at kernel/qobject.cpp:3069
#19 0xb7e24932 in QMetaObject::activate (sender=0xacf31e8, m=0xb7eff878, local_signal_index=0, argv=0xbf84129c) at kernel/qobject.cpp:3143
#20 0xb7e26be3 in QSignalMapper::mapped (this=0xacf31e8, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#21 0xb7e2746d in QSignalMapper::map (this=0xacf31e8, sender=0xaa9b620) at kernel/qsignalmapper.cpp:266
#22 0xb7e2765e in QSignalMapper::map (this=0xacf31e8) at kernel/qsignalmapper.cpp:257
#23 0xb7e27f2b in QSignalMapper::qt_metacall (this=0xacf31e8, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbf84141c) at .moc/release-shared/moc_qsignalmapper.cpp:81
#24 0xb7e23ca8 in QMetaObject::activate (sender=0xaa9b620, from_signal_index=29, to_signal_index=30, argv=0xbf84141c) at kernel/qobject.cpp:3069
#25 0xb7e240e0 in QMetaObject::activate (sender=0xaa9b620, m=0xb71381e4, from_local_signal_index=2, to_local_signal_index=3, argv=0xbf84141c) at kernel/qobject.cpp:3163
#26 0xb6f512b1 in QAbstractButton::clicked (this=0xaa9b620, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#27 0xb6c7c0b9 in QAbstractButtonPrivate::emitClicked (this=0xaa41680) at widgets/qabstractbutton.cpp:543
#28 0xb6c7dd14 in QAbstractButtonPrivate::click (this=0xaa41680) at widgets/qabstractbutton.cpp:536
#29 0xb6c7dfa6 in QAbstractButton::mouseReleaseEvent (this=0xaa9b620, e=0xbf8419f8) at widgets/qabstractbutton.cpp:1115
#30 0xb68f1b43 in QWidget::event (this=0xaa9b620, event=0xbf8419f8) at kernel/qwidget.cpp:7516
#31 0xb6c7bf5e in QAbstractButton::event (this=0xaa9b620, e=0xbf8419f8) at widgets/qabstractbutton.cpp:1077
#32 0xb6d26f20 in QPushButton::event (this=0xaa9b620, e=0xbf8419f8) at widgets/qpushbutton.cpp:662
#33 0xb689ae9c in QApplicationPrivate::notify_helper (this=0x92d0f98, receiver=0xaa9b620, e=0xbf8419f8) at kernel/qapplication.cpp:4084
#34 0xb68a3b11 in QApplication::notify (this=0x92cb310, receiver=0xaa9b620, e=0xbf8419f8) at kernel/qapplication.cpp:3786
#35 0xb73d55cd in KApplication::notify (this=0x92cb310, receiver=0xaa9b620, event=0xbf8419f8) at /build/buildd/kde4libs-4.2.98a/kdeui/kernel/kapplication.cpp:302
#36 0xb7e0da3b in QCoreApplication::notifyInternal (this=0x92cb310, receiver=0xaa9b620, event=0xbf8419f8) at kernel/qcoreapplication.cpp:602
#37 0xb68a2b7e in QApplicationPrivate::sendMouseEvent (receiver=0xaa9b620, event=0xbf8419f8, alienWidget=0xaa9b620, nativeWidget=0xa18a920, buttonDown=0xb7145200, lastMouseReceiver=@0xb7145204)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#38 0xb691297e in QETWidget::translateMouseEvent (this=0xa18a920, event=0xbf84203c) at kernel/qapplication_x11.cpp:4425
#39 0xb6911ca7 in QApplication::x11ProcessEvent (this=0x92cb310, event=0xbf84203c) at kernel/qapplication_x11.cpp:3421
#40 0xb693cc6a in x11EventSourceDispatch (s=0x92d3da8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#41 0xb642db88 in IA__g_main_context_dispatch (context=0x92d2710) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#42 0xb64310eb in g_main_context_iterate (context=0x92d2710, block=1, dispatch=1, self=0x92d0470) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#43 0xb6431268 in IA__g_main_context_iteration (context=0x92d2710, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#44 0xb7e39438 in QEventDispatcherGlib::processEvents (this=0x92d0cb0, flags={i = -1081859592}) at kernel/qeventdispatcher_glib.cpp:323
#45 0xb693c365 in QGuiEventDispatcherGlib::processEvents (this=0x92d0cb0, flags={i = -1081859544}) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb7e0c06a in QEventLoop::processEvents (this=0xbf8422a0, flags={i = -1081859480}) at kernel/qeventloop.cpp:149
#47 0xb7e0c4aa in QEventLoop::exec (this=0xbf8422a0, flags={i = -1081859416}) at kernel/qeventloop.cpp:200
#48 0xb7e0e959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#49 0xb689ad17 in QApplication::exec () at kernel/qapplication.cpp:3553
#50 0xb3a145d0 in kdemain (argc=1, argv=0x92a2928) at /build/buildd/kdebase-workspace-4.2.98/plasma/shells/desktop/main.cpp:50
#51 0x0804e27d in launch (argc=1, _name=0x925357c "/usr/bin/plasma-desktop", args=0x9253594 "", cwd=0x0, envc=0, envs=0x9253598 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051391 "0") at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:676
#52 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1168
#53 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1361
#54 0x0804fbca in main (argc=2, argv=0xbf842a94, envp=0xbf842aa0) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1788

Reported using DrKonqi