Application: plasma-desktop (4.10.60)
KDE Platform Version: 4.10.60 (Compiled from sources)
Qt Version: 4.8.5
Operating System: Linux 3.8.7-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
Right click on the desktop.  Select "desktop settings" then very quickly select a new desktop and select "ok"

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3c27a62780 (LWP 1218))]

Thread 5 (Thread 0x7f3c06939700 (LWP 1219)):
#0  0x00007f3c25ef98b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f3c18977b2b in ?? () from /opt/qt4/lib/libQtScript.so.4
#2  0x00007f3c18977b69 in ?? () from /opt/qt4/lib/libQtScript.so.4
#3  0x00007f3c146d1764 in ?? () from /usr/lib/libGL.so.1
#4  0x00007f3c25ef5dd2 in start_thread () from /usr/lib/libpthread.so.0
#5  0x00007f3c244c5ced in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f3b77fb2700 (LWP 1223)):
#0  0x00007f3c244bd09d in poll () from /usr/lib/libc.so.6
#1  0x00007f3c20a211f4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f3c20a212fc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f3c262c2606 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#4  0x00007f3c2629468f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#5  0x00007f3c26294985 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#6  0x00007f3c26193e1f in QThread::exec() () from /opt/qt4/lib/libQtCore.so.4
#7  0x00007f3c26275fd3 in ?? () from /opt/qt4/lib/libQtCore.so.4
#8  0x00007f3c2619645f in ?? () from /opt/qt4/lib/libQtCore.so.4
#9  0x00007f3c146d1764 in ?? () from /usr/lib/libGL.so.1
#10 0x00007f3c25ef5dd2 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f3c244c5ced in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3b6e3dd700 (LWP 1571)):
#0  0x00007f3c25ef9c61 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f3c26196914 in QWaitCondition::wait(QMutex*, unsigned long) () from /opt/qt4/lib/libQtCore.so.4
#2  0x00007f3c2618a095 in ?? () from /opt/qt4/lib/libQtCore.so.4
#3  0x00007f3c2619645f in ?? () from /opt/qt4/lib/libQtCore.so.4
#4  0x00007f3c146d1764 in ?? () from /usr/lib/libGL.so.1
#5  0x00007f3c25ef5dd2 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f3c244c5ced in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f3b619c2700 (LWP 1572)):
#0  0x00007f3c25ef9c61 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f3c26196914 in QWaitCondition::wait(QMutex*, unsigned long) () from /opt/qt4/lib/libQtCore.so.4
#2  0x00007f3c2618a095 in ?? () from /opt/qt4/lib/libQtCore.so.4
#3  0x00007f3c2619645f in ?? () from /opt/qt4/lib/libQtCore.so.4
#4  0x00007f3c146d1764 in ?? () from /usr/lib/libGL.so.1
#5  0x00007f3c25ef5dd2 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f3c244c5ced in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f3c27a62780 (LWP 1218)):
[KCrash Handler]
#6  0x00007f3c257af370 in QAbstractButton::isChecked() const () from /opt/qt4/lib/libQtGui.so.4
#7  0x00007f3c1a984355 in Plasma::AppletPrivate::configDialogFinished (this=0x29e8460) at /home/newKDE/Kdesrc/kde/kdelibs/plasma/applet.cpp:2150
#8  0x00007f3c1a98a333 in Plasma::Applet::qt_static_metacall (_o=0x2a35450, _c=QMetaObject::InvokeMetaMethod, _id=35, _a=0x7fff66546440) at /home/newKDE/Kdebuild/kde/kdelibs/plasma/applet.moc:198
#9  0x00007f3c262a95bc in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /opt/qt4/lib/libQtCore.so.4
#10 0x00007f3c272d5987 in KDialog::okClicked (this=0x2ca98a0) at /home/newKDE/Kdebuild/kde/kdelibs/kdeui/kdialog.moc:271
#11 0x00007f3c272d4378 in KDialog::slotButtonClicked (this=0x2ca98a0, button=4) at /home/newKDE/Kdesrc/kde/kdelibs/kdeui/dialogs/kdialog.cpp:884
#12 0x00007f3c272d56a0 in KDialog::qt_static_metacall (_o=0x2ca98a0, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0x7fff66546670) at /home/newKDE/Kdebuild/kde/kdelibs/kdeui/kdialog.moc:166
#13 0x00007f3c262a95bc in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /opt/qt4/lib/libQtCore.so.4
#14 0x00007f3c262b0cde in QSignalMapper::mapped(int) () from /opt/qt4/lib/libQtCore.so.4
#15 0x00007f3c262b0de6 in QSignalMapper::map(QObject*) () from /opt/qt4/lib/libQtCore.so.4
#16 0x00007f3c262a95bc in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /opt/qt4/lib/libQtCore.so.4
#17 0x00007f3c25a4a4c2 in QAbstractButton::clicked(bool) () from /opt/qt4/lib/libQtGui.so.4
#18 0x00007f3c257aeef3 in ?? () from /opt/qt4/lib/libQtGui.so.4
#19 0x00007f3c257b0063 in ?? () from /opt/qt4/lib/libQtGui.so.4
#20 0x00007f3c257b014c in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /opt/qt4/lib/libQtGui.so.4
#21 0x00007f3c254529de in QWidget::event(QEvent*) () from /opt/qt4/lib/libQtGui.so.4
#22 0x00007f3c254034fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qt4/lib/libQtGui.so.4
#23 0x00007f3c25409bfd in QApplication::notify(QObject*, QEvent*) () from /opt/qt4/lib/libQtGui.so.4
#24 0x00007f3c27399d0a in KApplication::notify (this=0x259ff90, receiver=0x5512340, event=0x7fff66546d20) at /home/newKDE/Kdesrc/kde/kdelibs/kdeui/kernel/kapplication.cpp:311
#25 0x00007f3c26295a2d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/qt4/lib/libQtCore.so.4
#26 0x00007f3c254093b3 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /opt/qt4/lib/libQtGui.so.4
#27 0x00007f3c2547b580 in ?? () from /opt/qt4/lib/libQtGui.so.4
#28 0x00007f3c2547991c in QApplication::x11ProcessEvent(_XEvent*) () from /opt/qt4/lib/libQtGui.so.4
#29 0x00007f3c2549ff72 in ?? () from /opt/qt4/lib/libQtGui.so.4
#30 0x00007f3c20a20f06 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0x00007f3c20a21258 in ?? () from /usr/lib/libglib-2.0.so.0
#32 0x00007f3c20a212fc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#33 0x00007f3c262c25e5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#34 0x00007f3c254a0006 in ?? () from /opt/qt4/lib/libQtGui.so.4
#35 0x00007f3c2629468f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#36 0x00007f3c26294985 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt4/lib/libQtCore.so.4
#37 0x00007f3c26299a9b in QCoreApplication::exec() () from /opt/qt4/lib/libQtCore.so.4
#38 0x00007f3c0fe53e5f in kdemain (argc=1, argv=0x255c890) at /home/newKDE/Kdesrc/kde/kde-workspace/plasma/desktop/shell/main.cpp:126
#39 0x0000000000406cf8 in launch (argc=1, _name=0x24a3398 "/opt/kde/bin/plasma-desktop", args=0x24a33b4 "", cwd=0x0, envc=0, envs=0x24a33bc "", reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40d1df "0") at /home/newKDE/Kdesrc/kde/kdelibs/kinit/kinit.cpp:726
#40 0x0000000000407dfa in handle_launcher_request (sock=8, who=0x40d47c "launcher") at /home/newKDE/Kdesrc/kde/kdelibs/kinit/kinit.cpp:1218
#41 0x00000000004086b2 in handle_requests (waitForPid=0) at /home/newKDE/Kdesrc/kde/kdelibs/kinit/kinit.cpp:1411
#42 0x000000000040a274 in main (argc=4, argv=0x7fff665481f8, envp=0x7fff66548220) at /home/newKDE/Kdesrc/kde/kdelibs/kinit/kinit.cpp:1899

Reported using DrKonqi