tracking the bug says:
Überprüfung der Systemkonfiguration beim Start deaktiviert.

[?1034hUsing host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb70196d0 (LWP 3602)]
[KCrash handler]
#6  0xb7833db0 in QWidget::~QWidget () from /usr/lib/qt3/lib/libqt-mt.so.3
#7  0xb788ecb8 in QButton::~QButton () from /usr/lib/qt3/lib/libqt-mt.so.3
#8  0xb7f70aa1 in KCommonDecorationButton::~KCommonDecorationButton ()
   from /opt/kde3/lib/libkdecorations.so.1
#9  0xb6dfea0e in KWinSUSE2::SUSE2Button::~SUSE2Button ()
   from /opt/kde3/lib/kde3/kwin3_SUSE2.so
#10 0xb7f73a54 in KCommonDecoration::~KCommonDecoration ()
   from /opt/kde3/lib/libkdecorations.so.1
#11 0xb6dfa0fb in KWinSUSE2::SUSE2Client::~SUSE2Client ()
   from /opt/kde3/lib/kde3/kwin3_SUSE2.so
#12 0x0805c134 in KWD::Window::~Window ()
#13 0x08053916 in KWD::Decorator::handleWindowRemoved ()
#14 0x0805161d in KWD::Decorator::qt_invoke ()
#15 0xb77fb8ad in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0xb7e0e982 in KWinModule::windowRemoved ()
   from /opt/kde3/lib/libkdecore.so.4
#17 0xb7e154b5 in KWinModulePrivate::removeClient ()
   from /opt/kde3/lib/libkdecore.so.4
#18 0xb7e04dcb in NETRootInfo::update () from /opt/kde3/lib/libkdecore.so.4
#19 0xb7e051f5 in NETRootInfo::event () from /opt/kde3/lib/libkdecore.so.4
#20 0xb7e16228 in KWinModulePrivate::x11Event ()
   from /opt/kde3/lib/libkdecore.so.4
#21 0xb7ede47a in KApplication::x11EventFilter ()
   from /opt/kde3/lib/libkdecore.so.4
#22 0x08054378 in KWD::Decorator::x11EventFilter ()
#23 0xb772aa45 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#24 0x0806b030 in ?? ()
#25 0xbf92bca8 in ?? ()
#26 0x00400000 in ?? ()
#27 0xb7c56ff4 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0xb7c56ff4 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0x08097c80 in ?? ()
#30 0xbf92bbb8 in ?? ()
#31 0xb773a9d1 in QApplication::x11ProcessEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
Backtrace stopped: frame did not save the PC

after rebooting system appears an white screen