Visit http://phoronix.com in Konqueror and you'll find that it crashes quite reliably (6 times in a row for me now). No page interaction is necessary, the crash occurs before the page finishes loading.

Please note that this backtrace looks quite similar to the one in #268341, modulo some refactoring. However, I will leave it to someone more qualified to determine if it is indeed a duplicate.

I've selected version 4.8.0, as there was no 4.8.1 in the list. (Actual version is 4.8.1.)

Application: Konqueror (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff491e96760 (LWP 10668))]

Thread 2 (Thread 0x7ff4765de700 (LWP 10680)):
#0  pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
#1  0x00007ff4909a45a2 in wait (time=30000, this=0x28dc740) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2845768, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007ff490997d6f in QThreadPoolThread::run (this=0x2858060) at concurrent/qthreadpool.cpp:141
#4  0x00007ff4909a372b in QThreadPrivate::start (arg=0x2858060) at thread/qthread_unix.cpp:298
#5  0x00007ff481a83354 in ?? () from /usr/lib64/opengl/nvidia/lib/libGL.so.1
#6  0x00007ff49070ec5c in start_thread (arg=0x7ff4765de700) at pthread_create.c:301
#7  0x00007ff48f493fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7ff491e96760 (LWP 10668)):
[KCrash Handler]
#6  isNull (this=0xe0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:580
#7  operator! (this=0xe0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:586
#8  KHTMLPart::loadObjectElement (this=<optimized out>, frame=<optimized out>, url=..., serviceType=..., params=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/khtml_part.cpp:4202
#9  0x00007ff47960121c in DOM::HTMLObjectBaseElementImpl::computeContent (this=0x3df2800) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/html/html_objectimpl.cpp:538
#10 0x00007ff479582e01 in DOM::NodeBaseImpl::appendChild (this=0x2847040, newChild=0x3df2810, exceptioncode=@0x7fffdaf4af98) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/xml/dom_nodeimpl.cpp:1801
#11 0x00007ff479720f84 in DOMNodeProtoFunc::callAsFunction (this=0x7ff491ce2c00, exec=0x7fffdaf4b9f0, thisObj=<optimized out>, args=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/ecma/kjs_dom.cpp:642
#12 0x00007ff478e543df in call (args=<optimized out>, thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/object.h:626
#13 KJS::Machine::runBlock (exec=0x7fffdaf4b9f0, codeBlock=..., parentExec=0x7fffdaf4c470) at codes.def:1223
#14 0x00007ff478e34d3e in KJS::FunctionImp::callAsFunction (this=0x7ff475835b40, exec=0x7fffdaf4c470, thisObj=<optimized out>, args=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/function.cpp:172
#15 0x00007ff478e543df in call (args=<optimized out>, thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/object.h:626
#16 KJS::Machine::runBlock (exec=0x7fffdaf4c470, codeBlock=..., parentExec=0x7fffdaf4cef0) at codes.def:1223
#17 0x00007ff478e34d3e in KJS::FunctionImp::callAsFunction (this=0x7ff475835ac0, exec=0x7fffdaf4cef0, thisObj=<optimized out>, args=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/function.cpp:172
#18 0x00007ff478e543df in call (args=<optimized out>, thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/object.h:626
#19 KJS::Machine::runBlock (exec=0x7fffdaf4cef0, codeBlock=..., parentExec=0x289ad10) at codes.def:1223
#20 0x00007ff478e34d3e in KJS::FunctionImp::callAsFunction (this=0x7ff475835940, exec=0x289ad10, thisObj=<optimized out>, args=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/function.cpp:172
#21 0x00007ff47977b788 in call (args=..., thisObj=0x7ff491ce1840, exec=0x289ad10, this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kjs/object.h:626
#22 KJS::JSEventListener::handleEvent (this=0x4505f10, evt=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/ecma/kjs_events.cpp:108
#23 0x00007ff4795a7b26 in DOM::EventTargetImpl::handleLocalEvents (this=0x27f6c38, evt=0x3c6ae60, useCapture=false) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/xml/dom2_eventsimpl.cpp:62
#24 0x00007ff479581e82 in DOM::NodeImpl::dispatchGenericEvent (this=0x27f6c38, evt=0x3c6ae60) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/xml/dom_nodeimpl.cpp:469
#25 0x00007ff4795820be in DOM::NodeImpl::dispatchEvent (this=0x27f6c38, evt=0x3c6ae60, exceptioncode=@0x7fffdaf4d23c, tempEvent=true) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/xml/dom_nodeimpl.cpp:401
#26 0x00007ff479583969 in DOM::NodeImpl::dispatchHTMLEvent (this=0x27f6c38, _id=36, canBubbleArg=true, cancelableArg=false) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/xml/dom_nodeimpl.cpp:520
#27 0x00007ff4794ffcbb in KHTMLPart::slotFinishedParsing (this=0x2645b40) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/khtml_part.cpp:2214
#28 0x00007ff47951d00a in KHTMLPart::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1_build/khtml/khtml_part.moc:256
#29 0x00007ff490ab9f53 in QMetaObject::activate (sender=0x27f6c20, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#30 0x00007ff490ab9f53 in QMetaObject::activate (sender=0x27fed10, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#31 0x00007ff4795c9143 in khtml::HTMLTokenizer::write (this=0x27fed10, str=<optimized out>, appendData=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/html/htmltokenizer.cpp:1892
#32 0x00007ff4795ca2a7 in khtml::HTMLTokenizer::notifyFinished (this=0x27fed10, finishedObj=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/html/htmltokenizer.cpp:2135
#33 0x00007ff4796e43bf in khtml::CachedScript::checkNotify (this=0x45922f0) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/misc/loader.cpp:397
#34 0x00007ff4796e456c in khtml::CachedScript::data (this=0x45922f0, buffer=<optimized out>, eof=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/misc/loader.cpp:389
#35 0x00007ff4796e48c7 in khtml::Loader::slotFinished (this=0x266a4d0, job=0x4472150) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/khtml/misc/loader.cpp:1262
#36 0x00007ff490ab9f53 in QMetaObject::activate (sender=0x4472150, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffdaf4db10) at kernel/qobject.cpp:3547
#37 0x00007ff490f414f2 in KJob::result (this=<optimized out>, _t1=0x4472150) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1_build/kdecore/kjob.moc:208
#38 0x00007ff490f41530 in KJob::emitResult (this=0x4472150) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kdecore/jobs/kjob.cpp:318
#39 0x00007ff4887a98dd in KIO::SimpleJob::slotFinished (this=0x4472150) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/job.cpp:494
#40 0x00007ff4887ad972 in KIO::TransferJob::slotFinished (this=0x4472150) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/job.cpp:1081
#41 0x00007ff490ab9f53 in QMetaObject::activate (sender=0x2820970, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#42 0x00007ff4888576b1 in KIO::SlaveInterface::dispatch (this=<optimized out>, _cmd=104, rawdata=...) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/slaveinterface.cpp:172
#43 0x00007ff4888546bd in KIO::SlaveInterface::dispatch (this=0x2820970) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/slaveinterface.cpp:88
#44 0x00007ff488847816 in KIO::Slave::gotInput (this=0x2820970) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/slave.cpp:344
#45 0x00007ff490ab9f53 in QMetaObject::activate (sender=0x28a4a60, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#46 0x00007ff48877a157 in KIO::ConnectionPrivate::dequeue (this=0x2845800) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kio/kio/connection.cpp:82
#47 0x00007ff490ab9396 in QObject::event (this=0x28a4a60, e=<optimized out>) at kernel/qobject.cpp:1195
#48 0x00007ff48fc24304 in QApplicationPrivate::notify_helper (this=0x208d530, receiver=0x28a4a60, e=0x422bc80) at kernel/qapplication.cpp:4550
#49 0x00007ff48fc28eff in QApplication::notify (this=<optimized out>, receiver=0x28a4a60, e=0x422bc80) at kernel/qapplication.cpp:4411
#50 0x00007ff4918848d6 in KApplication::notify (this=0x7fffdaf4f100, receiver=0x28a4a60, event=0x422bc80) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kdeui/kernel/kapplication.cpp:311
#51 0x00007ff490aa477b in QCoreApplication::notifyInternal (this=0x7fffdaf4f100, receiver=0x28a4a60, event=0x422bc80) at kernel/qcoreapplication.cpp:876
#52 0x00007ff490aa7d37 in sendEvent (event=0x422bc80, receiver=0x28a4a60) at kernel/qcoreapplication.h:231
#53 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1f88490) at kernel/qcoreapplication.cpp:1500
#54 0x00007ff490ad3723 in sendPostedEvents () at kernel/qcoreapplication.h:236
#55 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#56 0x00007ff48c219072 in g_main_dispatch (context=0x2090040) at gmain.c:2441
#57 g_main_context_dispatch (context=0x2090040) at gmain.c:3011
#58 0x00007ff48c219868 in g_main_context_iterate (context=0x2090040, block=1, dispatch=1, self=<optimized out>) at gmain.c:3089
#59 0x00007ff48c219a41 in g_main_context_iteration (context=0x2090040, may_block=1) at gmain.c:3152
#60 0x00007ff490ad38bf in QEventDispatcherGlib::processEvents (this=0x208d4f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#61 0x00007ff48fcc998e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#62 0x00007ff490aa37a2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#63 0x00007ff490aa3a55 in QEventLoop::exec (this=0x7fffdaf4eeb0, flags=...) at kernel/qeventloop.cpp:204
#64 0x00007ff490aa81db in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#65 0x00007ff47f287921 in kdemain (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-base/konqueror-4.8.1/work/konqueror-4.8.1/konqueror/src/konqmain.cpp:227
#66 0x00000000004074e3 in launch (argc=2, _name=0x2004a38 "/usr/bin/konqueror", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x2004a64 "i7-920;1331262071;520606;8377_TIME6492837") at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kinit/kinit.cpp:734
#67 0x000000000040814f in handle_launcher_request (sock=<optimized out>, who=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kinit/kinit.cpp:1226
#68 0x0000000000408835 in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kinit/kinit.cpp:1419
#69 0x000000000040943f in main (argc=2, argv=0x7fffdaf50828, envp=0x7fffdaf50840) at /var/tmp/portage/kde-base/kdelibs-4.8.1/work/kdelibs-4.8.1/kinit/kinit.cpp:1907