Version:           KDE 4.0.85 (using KDE 4.0.83)
Installed from:    Fedora RPMs
Compiler:          gcc 4.3.1 
OS:                Linux

When I shut down my laptop today (using the K-Menu entries, configured to not ask twice) I got the following crash:

Application: Plasma Workspace (plasma), signal SIGSEGV
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb7f78730 (LWP 2694)]
[New Thread 0xb5a49b90 (LWP 2700)]
[KCrash handler]
#6  0x0736dda0 in QGraphicsWidget::event (this=<value optimized out>, 
    event=<value optimized out>) at graphicsview/qgraphicswidget.cpp:1153
#7  0x06db7f2c in QApplicationPrivate::notify_helper (
    this=<value optimized out>, receiver=<value optimized out>, 
    e=<value optimized out>) at kernel/qapplication.cpp:3772
#8  0x06dbfcfe in QApplication::notify (this=<value optimized out>, 
    receiver=<value optimized out>, e=<value optimized out>)
    at kernel/qapplication.cpp:3366
#9  0x006198fd in KApplication::notify () from /usr/lib/libkdeui.so.5
#10 0x00c4a5df in QCoreApplication::notifyInternal (
    this=<value optimized out>, receiver=<value optimized out>, 
    event=<value optimized out>) at kernel/qcoreapplication.cpp:587
#11 0x0736e124 in QCoreApplication::sendEvent (event=<value optimized out>, 
    receiver=) at ../../src/corelib/kernel/qcoreapplication.h:215
#12 QGraphicsWidget::sceneEvent (this=<value optimized out>, 
    event=<value optimized out>) at graphicsview/qgraphicswidget.cpp:1003
#13 0x073491cc in QGraphicsScenePrivate::sendEvent (
    this=<value optimized out>, item=<value optimized out>, 
    event=<value optimized out>) at graphicsview/qgraphicsscene.cpp:1046
#14 0x07349c3a in QGraphicsScene::setFocusItem (this=<value optimized out>, 
    item=<value optimized out>, focusReason=<value optimized out>)
    at graphicsview/qgraphicsscene.cpp:2634
#15 0x073276ce in QGraphicsItem::clearFocus (this=<value optimized out>)
    at graphicsview/qgraphicsitem.cpp:1871
#16 0x0736ce7c in ~QGraphicsWidget (this=<value optimized out>)
    at graphicsview/qgraphicswidget.cpp:218
#17 0x02760dae in Plasma::Applet::~Applet () from /usr/lib/libplasma.so.2
#18 0x0278a133 in Plasma::Containment::~Containment ()
   from /usr/lib/libplasma.so.2
#19 0x013faf2b in ?? () from /usr/lib/kde4/plasma_containment_panel.so
#20 0x02796216 in Plasma::Corona::~Corona () from /usr/lib/libplasma.so.2
#21 0x07de573d in ?? () from /usr/lib/libkdeinit4_plasma.so
#22 0x07df2367 in ?? () from /usr/lib/libkdeinit4_plasma.so
#23 0x07df5293 in ?? () from /usr/lib/libkdeinit4_plasma.so
#24 0x00c5f230 in QMetaObject::activate (sender=<value optimized out>, 
    from_signal_index=<value optimized out>, 
    to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3010
#25 0x00c5ffb2 in QMetaObject::activate (sender=<value optimized out>, 
    m=<value optimized out>, local_signal_index=<value optimized out>, argv=)
    at kernel/qobject.cpp:3080
#26 0x00c99b27 in QCoreApplication::aboutToQuit (this=)
    at .moc/release-shared/moc_qcoreapplication.cpp:123
#27 0x00c4b557 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:849
#28 0x06db7da7 in QApplication::exec () at kernel/qapplication.cpp:3304
#29 0x07de8d41 in kdemain () from /usr/lib/libkdeinit4_plasma.so
#30 0x080487d2 in _start ()