Version:            (using KDE 4.2.4)
OS:                Linux
Installed from:    Debian testing/unstable Packages

This crash can be reproduced systematically with the following steps :
- go to http://phoronix.com
- click a link on the website
- click the back button of the browser

Here is the backtrace.

Application: Konqueror (konqueror), signal SIGSEGV
0x00007f8d0c528831 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c
[Current thread is 0 (LWP 7112)]

Thread 3 (Thread 0x7f8cfa673950 (LWP 7113)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007f8d0a07f717 in QWaitCondition::wait (this=0x1e9eb28, mutex=0x1e9eb20, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f8d0a0752f9 in QThreadPoolThread::run (this=0x1f2c680) at concurrent/qthreadpool.cpp:140
#3  0x00007f8d0a07e742 in QThreadPrivate::start (arg=0x1f2c680) at thread/qthread_unix.cpp:189
#4  0x00007f8d0602dfaa in start_thread (arg=<value optimized out>) at pthread_create.c:300
#5  0x00007f8d0c55829d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8cf976f950 (LWP 7114)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007f8d0a07f717 in QWaitCondition::wait (this=0x1e9eb28, mutex=0x1e9eb20, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f8d0a0752f9 in QThreadPoolThread::run (this=0x2733760) at concurrent/qthreadpool.cpp:140
#3  0x00007f8d0a07e742 in QThreadPrivate::start (arg=0x2733760) at thread/qthread_unix.cpp:189
#4  0x00007f8d0602dfaa in start_thread (arg=<value optimized out>) at pthread_create.c:300
#5  0x00007f8d0c55829d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()
Current language:  auto; currently asm

Thread 1 (Thread 0x7f8d0cbb1760 (LWP 7112)):
[KCrash Handler]
#5  QString::operator== (this=<value optimized out>, other=@0x7f8d0a45ca18) at tools/qstring.cpp:1910
#6  0x00007f8cfd4cbffd in KHTMLPart::restoreState (this=0x25d0540, stream=<value optimized out>) at /usr/include/qt4/QtCore/qstring.h:400
#7  0x00007f8cfd4cbfac in KHTMLPart::restoreState (this=0x1ea5320, stream=<value optimized out>) at ../../khtml/khtml_part.cpp:5387
#8  0x00007f8d0c825aa0 in KonqView::restoreHistory (this=0x1df08c0) at ../../../../apps/konqueror/src/konqview.cpp:871
#9  0x00007f8d0c87363a in KonqMainWindow::slotGoHistoryDelayed (this=0x19ab060) at ../../../../apps/konqueror/src/konqmainwindow.cpp:2845
#10 0x00007f8d0c87d055 in KonqMainWindow::qt_metacall (this=0x19ab060, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff14ce6fa0) at ./konqmainwindow.moc:438
#11 0x00007f8d0a17c862 in QMetaObject::activate (sender=0x2783de0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x10) at kernel/qobject.cpp:3120
#12 0x00007f8d0a181b9f in QSingleShotTimer::timerEvent (this=0x2783de0) at kernel/qtimer.cpp:298
#13 0x00007f8d0a176b43 in QObject::event (this=0x2783de0, e=0x7f8d0a45ca18) at kernel/qobject.cpp:1082
#14 0x00007f8d095a44fd in QApplicationPrivate::notify_helper (this=0x190cce0, receiver=0x2783de0, e=0x7fff14ce7660) at kernel/qapplication.cpp:4057
#15 0x00007f8d095ac77a in QApplication::notify (this=0x7fff14ce7b80, receiver=0x2783de0, e=0x7fff14ce7660) at kernel/qapplication.cpp:4022
#16 0x00007f8d0ad6338b in KApplication::notify (this=0x7fff14ce7b80, receiver=0x2783de0, event=0x7fff14ce7660) at ../../kdeui/kernel/kapplication.cpp:307
#17 0x00007f8d0a166e4c in QCoreApplication::notifyInternal (this=0x7fff14ce7b80, receiver=0x2783de0, event=0x7fff14ce7660) at kernel/qcoreapplication.cpp:610
#18 0x00007f8d0a194036 in QTimerInfoList::activateTimers (this=0x1910950) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 0x00007f8d0a19055d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:164
#20 0x00007f8d0627bf7a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0x00007f8d0627f5f8 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0x00007f8d0627f7bc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0x00007f8d0a1904bf in QEventDispatcherGlib::processEvents (this=0x18f8410, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#24 0x00007f8d0963cc7f in QGuiEventDispatcherGlib::processEvents (this=0x2d87dc0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x00007f8d0a1656f2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 349075664}) at kernel/qeventloop.cpp:149
#26 0x00007f8d0a165abd in QEventLoop::exec (this=0x7fff14ce7910, flags={i = 349075744}) at kernel/qeventloop.cpp:200
#27 0x00007f8d0a167d84 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#28 0x00007f8d0c8a1679 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/konqueror/src/konqmain.cpp:257
#29 0x00007f8d0c4a85a6 in __libc_start_main (main=0x4006f0 <main>, argc=2, ubp_av=0x7fff14ce85f8, init=0x400720 <__libc_csu_init>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fff14ce85e8) at libc-start.c:222
#30 0x0000000000400629 in _start () at ../sysdeps/x86_64/elf/start.S:113
#0  0x00007f8d0c528831 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c