Version:           3.4.2-5 (using KDE KDE 3.4.2)
Installed from:    SuSE RPMs
Compiler:          AMD64 
OS:                Linux

First when I have configured SPAM assign tools I have found that with every edit of this tool it adds new icons on the toolbar. When I tried to remove them, opened some panel of toolbar settings or else I can't remember and can not start the Kontact any more to find it.
Ok, after I tried to remove redudant icons from the toolbar, the Kontact have failed with the error. And every following try to open it fails since that, reporting the SIGSEGV.

Here is the bug report dump:

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Using host libthread_db library "/lib/tls/libthread_db.so.1".
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`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
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[Thread debugging using libthread_db enabled]
[New Thread 1104287328 (LWP 3953)]
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[KCrash handler]
#4  0x00000cf0 in ?? ()
#5  0x40977222 in KXMLGUI::ActionList::unplug ()
   from /opt/kde3/lib/libkdeui.so.4
#6  0x409fddf5 in KXMLGUI::ContainerNode::unplugClient ()
   from /opt/kde3/lib/libkdeui.so.4
#7  0x409fe06c in KXMLGUI::ContainerNode::unplugActions ()
   from /opt/kde3/lib/libkdeui.so.4
#8  0x409feaef in KXMLGUI::ContainerNode::destruct ()
   from /opt/kde3/lib/libkdeui.so.4
#9  0x409fecb1 in KXMLGUI::ContainerNode::destructChildren ()
   from /opt/kde3/lib/libkdeui.so.4
#10 0x409feadd in KXMLGUI::ContainerNode::destruct ()
   from /opt/kde3/lib/libkdeui.so.4
#11 0x40a8197e in KXMLGUIFactory::removeClient ()
   from /opt/kde3/lib/libkdeui.so.4
#12 0x404e407a in KParts::MainWindow::createGUI ()
   from /opt/kde3/lib/libkparts.so.2
#13 0x0805c501 in ?? ()
#14 0x08165900 in ?? ()
#15 0x083d02f8 in ?? ()
#16 0xbfd17770 in ?? ()
#17 0x41547c44 in _int_free () from /lib/tls/libc.so.6
#18 0x0805ea90 in ?? ()
#19 0x08165900 in ?? ()
#20 0x0827a220 in ?? ()
#21 0x08165900 in ?? ()
#22 0x0806721c in typeinfo name for QPtrList<KAction> ()
#23 0x08069878 in static_QUType_QString ()
#24 0x0000000a in ?? ()
#25 0x40727030 in KFileMetaInfo::KFileMetaInfo ()
   from /opt/kde3/lib/libkio.so.4
#26 0x0805ee3f in ?? ()
#27 0x08165900 in ?? ()
#28 0x0806686f in typeinfo name for QPtrList<KAction> ()
#29 0xbfd17838 in ?? ()
#30 0x41249333 in QGArray::~QGArray () from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0x40c55378 in KUniqueApplication::processDelayed ()
   from /opt/kde3/lib/libkdecore.so.4
#32 0x40c56c1c in KUniqueApplication::qt_invoke ()
   from /opt/kde3/lib/libkdecore.so.4
#33 0x40f92209 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#34 0x412d2902 in QSignal::signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#35 0x40faefdb in QSignal::activate () from /usr/lib/qt3/lib/libqt-mt.so.3
#36 0x40fb6963 in QSingleShotTimer::event ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#37 0x40f32aa1 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#38 0x40f33419 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#39 0x40c4497e in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#40 0x40f277d8 in QEventLoop::activateTimers ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#41 0x40ee0edf in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#42 0x40f49999 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#43 0x40f49896 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#44 0x40f323ef in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#45 0x0805a1bb in ?? ()
#46 0xbfd17ef0 in ?? ()
#47 0x00000001 in ?? ()
#48 0x00000001 in ?? ()
#49 0x00000000 in ?? ()
#50 0x00000000 in ?? ()
#51 0x00000001 in ?? ()
#52 0x08066cd8 in typeinfo name for QPtrList<KAction> ()
#53 0x00000000 in ?? ()
#54 0x08066320 in typeinfo name for QPtrList<KAction> ()
#55 0x0806630c in typeinfo name for QPtrList<KAction> ()
#56 0x00000021 in ?? ()
#57 0x416008b0 in main_arena () from /lib/tls/libc.so.6
#58 0x00000004 in ?? ()
#59 0x00000020 in ?? ()
#60 0x41548241 in _int_malloc () from /lib/tls/libc.so.6
#61 0x414f8ea0 in __libc_start_main () from /lib/tls/libc.so.6
#62 0x08057991 in ?? ()