Version:           4.1.2 (using KDE 4.1.2)
OS:                Linux
Installed from:    Mandriva RPMs

I'm running Mandriva 2009 x64-edition. I'm not using 3d-desktop.
Just after startup, when I click program menu button, Plasma Workspace crashes. After that plasma runs again and sometimes successfully. Nevertheless the crash can repeat occasionally. After 3-4 crashes Plasma doesn't rerun anymore.

Application: Plasma Workspace (plasma), signal SIGABRT
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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[Thread debugging using libthread_db enabled]
[New Thread 0x7f101b0fe700 (LWP 3992)]
[New Thread 0x42654950 (LWP 4055)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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[KCrash handler]
#5  0x00007f101ab53975 in raise () from /lib64/libc.so.6
#6  0x00007f101ab551a3 in abort () from /lib64/libc.so.6
#7  0x00007f101ab96010 in ?? () from /lib64/libc.so.6
#8  0x00007f100e00cd26 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#9  0x00007f100e00a604 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#10 0x00007f100e00bea5 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#11 0x00007f100e036e82 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#12 0x00007f100e03a946 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#13 0x00007f100e037d98 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#14 0x00007f100e038da9 in ?? ()
   from /usr/lib64/kde4/plasma_applet_mandrivalauncher.so
#15 0x00007f1019aafc34 in QMetaObject::activate ()
   from /usr/lib64/libQtCore.so.4
#16 0x00007f101a868f5f in Plasma::Icon::pressed ()
   from /usr/lib64/libplasma.so.2
#17 0x00007f101a86b296 in Plasma::Icon::mousePressEvent ()
   from /usr/lib64/libplasma.so.2
#18 0x00007f1018b042c6 in QGraphicsItem::sceneEvent ()
   from /usr/lib64/libQtGui.so.4
#19 0x00007f1018b231d6 in ?? () from /usr/lib64/libQtGui.so.4
#20 0x00007f1018b2bd90 in ?? () from /usr/lib64/libQtGui.so.4
#21 0x00007f1018b2ab30 in QGraphicsScene::event ()
   from /usr/lib64/libQtGui.so.4
#22 0x00007f10185e9a2d in QApplicationPrivate::notify_helper ()
   from /usr/lib64/libQtGui.so.4
#23 0x00007f10185f17ba in QApplication::notify ()
   from /usr/lib64/libQtGui.so.4
#24 0x00007f101a3b10fb in KApplication::notify ()
   from /usr/lib64/libkdeui.so.5
#25 0x00007f1019a9b85f in QCoreApplication::notifyInternal ()
   from /usr/lib64/libQtCore.so.4
#26 0x00007f1018b3671d in QGraphicsView::mousePressEvent ()
   from /usr/lib64/libQtGui.so.4
#27 0x00007f101863c0cf in QWidget::event () from /usr/lib64/libQtGui.so.4
#28 0x00007f1018b3871b in QGraphicsView::viewportEvent ()
   from /usr/lib64/libQtGui.so.4
#29 0x00007f1019a9ab38 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib64/libQtCore.so.4
#30 0x00007f10185e99fc in QApplicationPrivate::notify_helper ()
   from /usr/lib64/libQtGui.so.4
#31 0x00007f10185f201c in QApplication::notify ()
   from /usr/lib64/libQtGui.so.4
#32 0x00007f101a3b10fb in KApplication::notify ()
   from /usr/lib64/libkdeui.so.5
#33 0x00007f1019a9b85f in QCoreApplication::notifyInternal ()
   from /usr/lib64/libQtCore.so.4
#34 0x00007f10185f13c8 in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib64/libQtGui.so.4
#35 0x00007f1018655949 in ?? () from /usr/lib64/libQtGui.so.4
#36 0x00007f10186543a7 in QApplication::x11ProcessEvent ()
   from /usr/lib64/libQtGui.so.4
#37 0x00007f101867af84 in ?? () from /usr/lib64/libQtGui.so.4
#38 0x00007f10140fd8d2 in g_main_context_dispatch ()
   from /usr/lib64/libglib-2.0.so.0
#39 0x00007f101410105d in ?? () from /usr/lib64/libglib-2.0.so.0
#40 0x00007f101410121b in g_main_context_iteration ()
   from /usr/lib64/libglib-2.0.so.0
#41 0x00007f1019ac3bff in QEventDispatcherGlib::processEvents ()
   from /usr/lib64/libQtCore.so.4
#42 0x00007f101867a72f in ?? () from /usr/lib64/libQtGui.so.4
#43 0x00007f1019a9a182 in QEventLoop::processEvents ()
   from /usr/lib64/libQtCore.so.4
#44 0x00007f1019a9a30d in QEventLoop::exec () from /usr/lib64/libQtCore.so.4
#45 0x00007f1019a9c7bd in QCoreApplication::exec ()
   from /usr/lib64/libQtCore.so.4
#46 0x00007f101ae9c253 in kdemain () from /usr/lib64/libkdeinit4_plasma.so
#47 0x00007f101ab40316 in __libc_start_main () from /lib64/libc.so.6
#48 0x00000000004005c9 in _start ()