Application that crashed: konqueror
Version of the application: 4.2.85 (KDE 4.2.85 (KDE 4.3 Beta1))
KDE Version: 4.2.85 (KDE 4.2.85 (KDE 4.3 Beta1))
Qt Version: 4.5.1
Operating System: Linux 2.6.28.5 x86_64

What I was doing when the application crashed:
start konquror, go to url http://pinheiro-kde.blogspot.com/2009/05/back-to-fire.html
select oxygen link in upper left corner this brings you to http://pinheiro-kde.blogspot.com/
Scroll down and select post "A block of black" this brings you to http://pinheiro-kde.blogspot.com/2009/05/block-of-black.html
select image this loads image from url http://4.bp.blogspot.com/__JNFVYfijS4/SgdCJ64jhKI/AAAAAAAAAi0/HVSQMNIoNtc/s1600-h/rect2794.png
select konqorors back button once which will bring you back to url http://pinheiro-kde.blogspot.com/2009/05/block-of-black.html
select the back button again and konquror will crash, I am able to duplicate following the above steps. 

 -- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
[KCrash Handler]
#5  QString::operator== (this=<value optimized out>, other=@0xce1af8) at tools/qstring.cpp:1910
#6  0x00007f602f9232fe in KHTMLPart::restoreState () from /opt/lib/libkhtml.so.5
#7  0x00007f603efb0115 in KonqView::restoreHistory () from /opt/lib/libkdeinit4_konqueror.so
#8  0x00007f603eff7e7a in KonqMainWindow::slotGoHistoryDelayed () from /opt/lib/libkdeinit4_konqueror.so
#9  0x00007f603f00722d in KonqMainWindow::qt_metacall () from /opt/lib/libkdeinit4_konqueror.so
#10 0x00007f603ca48bb8 in QMetaObject::activate (sender=0x2e00600, from_signal_index=<value optimized out>, to_signal_index=4, argv=0xe) at kernel/qobject.cpp:3117
#11 0x00007f603ca4e62f in QSingleShotTimer::timerEvent (this=0x2e00600) at kernel/qtimer.cpp:298
#12 0x00007f603ca457e5 in QObject::event (this=0x2e00600, e=0xce1af8) at kernel/qobject.cpp:1082
#13 0x00007f603bd997ef in QApplicationPrivate::notify_helper (this=0x64a740, receiver=0x2e00600, e=0x7fff4747eaa0) at kernel/qapplication.cpp:4057
#14 0x00007f603bda0255 in QApplication::notify (this=0x7fff4747ef80, receiver=0x2e00600, e=0x7fff4747eaa0) at kernel/qapplication.cpp:4022
#15 0x00007f603d85ea1b in KApplication::notify () from /opt/lib/libkdeui.so.5
#16 0x00007f603ca36404 in QCoreApplication::notifyInternal (this=0x7fff4747ef80, receiver=0x2e00600, event=0x7fff4747eaa0) at kernel/qcoreapplication.cpp:606
#17 0x00007f603ca5d2d9 in QTimerInfoList::activateTimers (this=0x64de90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#18 0x00007f603ca5b04d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:164
#19 0x00007f603874d9c4 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#20 0x00007f6038750cc5 in ?? () from /usr/lib64/libglib-2.0.so.0
#21 0x00007f60387511ab in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#22 0x00007f603ca5b67f in QEventDispatcherGlib::processEvents (this=0x649060, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#23 0x00007f603be1bb3f in QGuiEventDispatcherGlib::processEvents (this=0x2d4e570, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#24 0x00007f603ca35835 in QEventLoop::processEvents (this=<value optimized out>, flags=@0x7fff4747ecf0) at kernel/qeventloop.cpp:149
#25 0x00007f603ca359a7 in QEventLoop::exec (this=0x7fff4747ed30, flags=@0x7fff4747ed40) at kernel/qeventloop.cpp:196
#26 0x00007f603ca37a3c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#27 0x00007f603f032ea0 in kdemain () from /opt/lib/libkdeinit4_konqueror.so
#28 0x00007f6039fa6164 in __libc_start_main () from /lib64/libc.so.6
#29 0x0000000000400799 in _start ()