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 2.6.29.1-jungo-skas3 i686

What I was doing when the application crashed:
Shortly after plasma button was clicked KDE workspace crashed

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5f31930 (LWP 4063))]

Thread 2 (Thread 0xa8affb90 (LWP 4066)):
#0  0xb7f41424 in __kernel_vsyscall ()
#1  0xb6663f65 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb683d78d in pthread_cond_wait () from /lib/i686/cmov/libc.so.6
#3  0xb7d45502 in QWaitConditionPrivate::wait (this=0x82ef8e0, mutex=0x82ef8dc, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x82ef8e0, mutex=0x82ef8dc, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0xb656963a in QHostInfoAgent::run (this=0x82ef8d0) at kernel/qhostinfo.cpp:260
#6  0xb7d44522 in QThreadPrivate::start (arg=0x82ef8d0) at thread/qthread_unix.cpp:188
#7  0xb66604b5 in start_thread () from /lib/i686/cmov/libpthread.so.0
#8  0xb682ea4e in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5f31930 (LWP 4063)):
[KCrash Handler]
#6  0xb5cc3d0d in Plasma::ExtenderItem::config() const () from /usr/lib/libplasma.so.3
#7  0xb5cc5893 in Plasma::ExtenderItem::isGroup() const () from /usr/lib/libplasma.so.3
#8  0xb5cbbb8a in Plasma::Extender::isEmpty() const () from /usr/lib/libplasma.so.3
#9  0xb5cd4610 in ?? () from /usr/lib/libplasma.so.3
#10 0xb5cd4b93 in Plasma::PopupApplet::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#11 0xa94587da in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0xb7e4aad3 in QMetaObject::activate (sender=0x880d0a8, from_signal_index=5, to_signal_index=5, argv=0x0) at kernel/qobject.cpp:3112
#13 0xb7e4b722 in QMetaObject::activate (sender=0x880d0a8, m=0xb5de9e0c, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#14 0xb5d3f987 in Plasma::BusyWidget::clicked() () from /usr/lib/libplasma.so.3
#15 0xb5d3f9bd in Plasma::BusyWidget::mousePressEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libplasma.so.3
#16 0xb70dea22 in QGraphicsItem::sceneEvent (this=0x880d0b0, event=0xbf85ae64) at graphicsview/qgraphicsitem.cpp:5022
#17 0xb712e9ef in QGraphicsWidget::sceneEvent (this=0x880d0a8, event=0xbf85ae64) at graphicsview/qgraphicswidget.cpp:1110
#18 0xb7103e84 in QGraphicsScenePrivate::sendEvent (this=0x81c21f0, item=0x880d0b0, event=0xbf85ae64) at graphicsview/qgraphicsscene.cpp:1159
#19 0xb710546e in QGraphicsScenePrivate::sendMouseEvent (this=0x81c21f0, mouseEvent=0xbf85ae64) at graphicsview/qgraphicsscene.cpp:1230
#20 0xb7110803 in QGraphicsScenePrivate::mousePressEventHandler (this=0x81c21f0, mouseEvent=0xbf85ae64) at graphicsview/qgraphicsscene.cpp:1319
#21 0xb711143a in QGraphicsScene::event (this=0x81c75a0, event=0xbf85ae64) at graphicsview/qgraphicsscene.cpp:3805
#22 0xb6adf7d4 in QApplicationPrivate::notify_helper (this=0x80cfe98, receiver=0x81c75a0, e=0xbf85ae64) at kernel/qapplication.cpp:4056
#23 0xb6ae793e in QApplication::notify (this=0x80bd1a8, receiver=0x81c75a0, e=0xbf85ae64) at kernel/qapplication.cpp:3603
#24 0xb752800d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#25 0xb7e3596b in QCoreApplication::notifyInternal (this=0x80bd1a8, receiver=0x80bd1a8, event=0xbf85ae64) at kernel/qcoreapplication.cpp:610
#26 0xb711f1b3 in QCoreApplication::sendEvent (this=0x87a9560, event=0xbf85b52c) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#27 QGraphicsView::mousePressEvent (this=0x87a9560, event=0xbf85b52c) at graphicsview/qgraphicsview.cpp:3212
#28 0xb6b3583e in QWidget::event (this=0x87a9560, event=0xbf85b52c) at kernel/qwidget.cpp:7545
#29 0xb6edbf03 in QFrame::event (this=0x87a9560, e=0xbf85b52c) at widgets/qframe.cpp:559
#30 0xb6f7af1f in QAbstractScrollArea::viewportEvent (this=0x87a9560, e=0x8cd1028) at widgets/qabstractscrollarea.cpp:962
#31 0xb7123c02 in QGraphicsView::viewportEvent (this=0x87a9560, event=0xbf85b52c) at graphicsview/qgraphicsview.cpp:2919
#32 0xb6f7d4f5 in QAbstractScrollAreaPrivate::viewportEvent (this=0x83cd0f0, o=0x833cd08, e=0xbf85b52c) at widgets/qabstractscrollarea_p.h:100
#33 QAbstractScrollAreaFilter::eventFilter (this=0x83cd0f0, o=0x833cd08, e=0xbf85b52c) at widgets/qabstractscrollarea_p.h:111
#34 0xb7e34b9a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x80cfe98, receiver=0x833cd08, event=0xbf85b52c) at kernel/qcoreapplication.cpp:726
#35 0xb6adf7ac in QApplicationPrivate::notify_helper (this=0x80cfe98, receiver=0x833cd08, e=0xbf85b52c) at kernel/qapplication.cpp:4052
#36 0xb6ae82a1 in QApplication::notify (this=0x80bd1a8, receiver=0x833cd08, e=0xbf85b52c) at kernel/qapplication.cpp:3758
#37 0xb752800d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#38 0xb7e3596b in QCoreApplication::notifyInternal (this=0x80bd1a8, receiver=0x80bd1a8, event=0xbf85b52c) at kernel/qcoreapplication.cpp:610
#39 0xb6ae732e in QCoreApplication::sendSpontaneousEvent (receiver=0x833cd08, event=0xbf85b52c, alienWidget=0x833cd08, nativeWidget=0x87a9560, buttonDown=0xb7355aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#40 QApplicationPrivate::sendMouseEvent (receiver=0x833cd08, event=0xbf85b52c, alienWidget=0x833cd08, nativeWidget=0x87a9560, buttonDown=0xb7355aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#41 0xb6b55e55 in QETWidget::translateMouseEvent (this=0x87a9560, event=0xbf85cadc) at kernel/qapplication_x11.cpp:4409
#42 0xb6b55336 in QApplication::x11ProcessEvent (this=0x80bd1a8, event=0xbf85cadc) at kernel/qapplication_x11.cpp:3428
#43 0xb6b7f842 in x11EventSourceDispatch (s=0x80d2a00, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#44 0xb66ad848 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#45 0xb66b0dab in ?? () from /usr/lib/libglib-2.0.so.0
#46 0xb66b0f28 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#47 0xb7e607f8 in QEventDispatcherGlib::processEvents (this=0x80cf948, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#48 0xb6b7ef85 in QGuiEventDispatcherGlib::processEvents (this=0x80cf948, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#49 0xb7e33fba in QEventLoop::processEvents (this=0xbf85cd40, flags=...) at kernel/qeventloop.cpp:149
#50 0xb7e34402 in QEventLoop::exec (this=0xbf85cd40, flags=...) at kernel/qeventloop.cpp:201
#51 0xb7e36859 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#52 0xb6adf657 in QApplication::exec () at kernel/qapplication.cpp:3525
#53 0xb4b08ee0 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#54 0x0804e291 in _start ()

Reported using DrKonqi