Version:            (using KDE KDE 3.5.8)
Installed from:    Fedora RPMs

Open http://www.hs.fi/

At right hand side, RMB klick ad-box-frame, 

frame->block this frame

and it crashes.

crash trace:

Using host libthread_db library "/lib64/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 46912496359200 (LWP 27057)]
[KCrash handler]
#5  0x000000344683909e in QString::deref ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#6  0x0000003446839ddf in QString::operator= ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#7  0x000000344abb80ab in KHTMLPart::khtmlMouseMoveEvent (this=0x39781e0, 
    event=<value optimized out>) at khtml_part.cpp:6380
#8  0x00000034465631c6 in QObject::event ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#9  0x00000034465029a5 in QApplication::internalNotify ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#10 0x0000003446503c70 in QApplication::notify ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#11 0x00000034477c3678 in KApplication::notify (this=0x7fff68b76020, 
    receiver=0x39781e0, event=0x7fff68b74930) at kapplication.cpp:550
#12 0x000000344abbd7e3 in KHTMLView::viewportMouseMoveEvent (this=0x3e2f850, 
    _mouse=0x7fff68b751d0) at /usr/lib64/qt-3.3/include/qapplication.h:520
#13 0x0000003446677d54 in QScrollView::eventFilter ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#14 0x000000344ab96496 in KHTMLView::eventFilter (this=0x3e2f850, 
    o=0x3e30470, e=0x7fff68b751d0) at khtmlview.cpp:1979
#15 0x00000034465630e2 in QObject::activate_filters ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#16 0x0000003446563157 in QObject::event ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#17 0x000000344659a6b8 in QWidget::event ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#18 0x00000034465029a5 in QApplication::internalNotify ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#19 0x0000003446503e50 in QApplication::notify ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#20 0x00000034477c3678 in KApplication::notify (this=0x7fff68b76020, 
    receiver=0x3e30470, event=0x7fff68b751d0) at kapplication.cpp:550
#21 0x00000034464a1b5a in QETWidget::translateMouseEvent ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#22 0x00000034464a0f49 in QApplication::x11ProcessEvent ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#23 0x00000034464b0ea4 in QEventLoop::processEvents ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#24 0x000000344651a151 in QEventLoop::enterLoop ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#25 0x000000344651a032 in QEventLoop::exec ()
   from /usr/lib64/qt-3.3/lib/libqt-mt.so.3
#26 0x0000003449ac0f6c in kdemain (argc=<value optimized out>, 
    argv=<value optimized out>) at konq_main.cc:206
#27 0x0000003ac081e074 in __libc_start_main () from /lib64/libc.so.6
#28 0x0000000000400509 in _start ()