Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
If i uncheck the "Show friends" option in the settings dialog of microblogging and "save" it with click on "ok" - the whole plasma workspace crashes. 

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 11447)]

Thread 2 (Thread 0xa83fab90 (LWP 11450)):
#0  0xb7f80430 in __kernel_vsyscall ()
#1  0xb64760e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66562ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7d7f5b2 in QWaitCondition::wait (this=0x89f48d0, mutex=0x89f48cc, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb76c2ae2 in QHostInfoAgent::run (this=0x89f48c0) at kernel/qhostinfo.cpp:260
#5  0xb7d7e56e in QThreadPrivate::start (arg=0x89f48c0) at thread/qthread_unix.cpp:189
#6  0xb64724ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb664749e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5f80a10 (LWP 11447)):
[KCrash Handler]
#6  KConfigGroup::writeEntry (this=0xbfa9b1c4, key=0xa843c486 "password", value=@0xbfa9b13c, flags={i = -1079398088}) at /usr/include/qt4/QtCore/qshareddata.h:187
#7  0xb7b71a7d in KConfigGroup::writeEntry (this=0xbfa9b1c4, key=0xa843c486 "password", value=@0x89a9cc8, flags={i = -1079397916}) at /build/buildd/kde4libs-4.2.96/kdecore/config/kconfiggroup.cpp:904
#8  0xa843309c in MicroBlog::downloadHistory (this=0x89a9c68) at /build/buildd/kdeplasma-addons-4.2.96/applets/microblog/microblog.cpp:829
#9  0xa84387c2 in MicroBlog::configAccepted (this=0x89a9c68) at /build/buildd/kdeplasma-addons-4.2.96/applets/microblog/microblog.cpp:703
#10 0xa84398f3 in MicroBlog::qt_metacall (this=0x89a9c68, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfa9b368)
    at /build/buildd/kdeplasma-addons-4.2.96/obj-i486-linux-gnu/applets/microblog/microblog.moc:96
#11 0xb7e88a58 in QMetaObject::activate (sender=0x8ddaf70, from_signal_index=45, to_signal_index=45, argv=0x0) at kernel/qobject.cpp:3120
#12 0xb7e896e2 in QMetaObject::activate (sender=0x8ddaf70, m=0xb75ee144, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3194
#13 0xb73ac257 in KDialog::okClicked (this=0x8ddaf70) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kdeui/kdialog.moc:252
#14 0xb73aea98 in KDialog::slotButtonClicked (this=0x8ddaf70, button=4) at /build/buildd/kde4libs-4.2.96/kdeui/dialogs/kdialog.cpp:854
#15 0xb73b0cac in KDialog::qt_metacall (this=0x8ddaf70, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbfa9b55c) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kdeui/kdialog.moc:184
#16 0xb74774aa in KPageDialog::qt_metacall (this=0x8ddaf70, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfa9b55c) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kdeui/kpagedialog.moc:64
#17 0xb739b79a in KConfigDialog::qt_metacall (this=0x8ddaf70, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfa9b55c) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kdeui/kconfigdialog.moc:78
#18 0xb7e88a58 in QMetaObject::activate (sender=0x8f08e80, from_signal_index=4, to_signal_index=4, argv=0xbfa9b55c) at kernel/qobject.cpp:3120
#19 0xb7e896e2 in QMetaObject::activate (sender=0x8f08e80, m=0xb7f64878, local_signal_index=0, argv=0xbfa9b55c) at kernel/qobject.cpp:3194
#20 0xb7e8b993 in QSignalMapper::mapped (this=0x8f08e80, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#21 0xb7e8c21d in QSignalMapper::map (this=0x8f08e80, sender=0x8f1b6c0) at kernel/qsignalmapper.cpp:266
#22 0xb7e8c40e in QSignalMapper::map (this=0x8f08e80) at kernel/qsignalmapper.cpp:257
#23 0xb7e8ccdb in QSignalMapper::qt_metacall (this=0x8f08e80, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfa9b6dc) at .moc/release-shared/moc_qsignalmapper.cpp:81
#24 0xb7e88a58 in QMetaObject::activate (sender=0x8f1b6c0, from_signal_index=29, to_signal_index=30, argv=0xbfa9b6dc) at kernel/qobject.cpp:3120
#25 0xb7e88e90 in QMetaObject::activate (sender=0x8f1b6c0, m=0xb71b11e4, from_local_signal_index=2, to_local_signal_index=3, argv=0xbfa9b6dc) at kernel/qobject.cpp:3214
#26 0xb6fc8c81 in QAbstractButton::clicked (this=0x8f1b6c0, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#27 0xb6cf1979 in QAbstractButtonPrivate::emitClicked (this=0x8f21ad0) at widgets/qabstractbutton.cpp:543
#28 0xb6cf35b4 in QAbstractButtonPrivate::click (this=0x8f21ad0) at widgets/qabstractbutton.cpp:536
#29 0xb6cf3846 in QAbstractButton::mouseReleaseEvent (this=0x8f1b6c0, e=0xbfa9bcb8) at widgets/qabstractbutton.cpp:1115
#30 0xb69638c3 in QWidget::event (this=0x8f1b6c0, event=0xbfa9bcb8) at kernel/qwidget.cpp:7521
#31 0xb6cf181e in QAbstractButton::event (this=0x8f1b6c0, e=0xbfa9bcb8) at widgets/qabstractbutton.cpp:1077
#32 0xb6d9c8c0 in QPushButton::event (this=0x8f1b6c0, e=0xbfa9bcb8) at widgets/qpushbutton.cpp:662
#33 0xb690cbcc in QApplicationPrivate::notify_helper (this=0x848aea0, receiver=0x8f1b6c0, e=0xbfa9bcb8) at kernel/qapplication.cpp:4057
#34 0xb6915851 in QApplication::notify (this=0x8485360, receiver=0x8f1b6c0, e=0xbfa9bcb8) at kernel/qapplication.cpp:3759
#35 0xb74464dd in KApplication::notify (this=0x8485360, receiver=0x8f1b6c0, event=0xbfa9bcb8) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#36 0xb7e727ab in QCoreApplication::notifyInternal (this=0x8485360, receiver=0x8f1b6c0, event=0xbfa9bcb8) at kernel/qcoreapplication.cpp:610
#37 0xb69148be in QApplicationPrivate::sendMouseEvent (receiver=0x8f1b6c0, event=0xbfa9bcb8, alienWidget=0x8f1b6c0, nativeWidget=0x8ddaf70, buttonDown=0xb71b8aa0, lastMouseReceiver=@0xb71b8aa4)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#38 0xb6984aee in QETWidget::translateMouseEvent (this=0x8ddaf70, event=0xbfa9d34c) at kernel/qapplication_x11.cpp:4448
#39 0xb6983ead in QApplication::x11ProcessEvent (this=0x8485360, event=0xbfa9d34c) at kernel/qapplication_x11.cpp:3444
#40 0xb69af06a in x11EventSourceDispatch (s=0x848d7f8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#41 0xb64bfb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0xb64c30eb in ?? () from /usr/lib/libglib-2.0.so.0
#43 0xb64c3268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0xb7e9e1d8 in QEventDispatcherGlib::processEvents (this=0x848abb8, flags={i = -1079388920}) at kernel/qeventdispatcher_glib.cpp:324
#45 0xb69ae765 in QGuiEventDispatcherGlib::processEvents (this=0x848abb8, flags={i = -1079388872}) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb7e70dda in QEventLoop::processEvents (this=0xbfa9d5b0, flags={i = -1079388808}) at kernel/qeventloop.cpp:149
#47 0xb7e7121a in QEventLoop::exec (this=0xbfa9d5b0, flags={i = -1079388744}) at kernel/qeventloop.cpp:200
#48 0xb7e736c9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0xb690ca47 in QApplication::exec () at kernel/qapplication.cpp:3526
#50 0xb3b475d0 in kdemain (argc=1, argv=0x840d4c8) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#51 0x0804e27d in launch (argc=1, _name=0x840e57c "/usr/bin/plasma-desktop", args=0x840e594 "", cwd=0x0, envc=0, envs=0x840e598 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051391 "0") at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:676
#52 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1168
#53 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1361
#54 0x0804fbca in main (argc=2, argv=0xbfa9dda4, envp=0xbfa9ddb0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 199901

Reported using DrKonqi