Version:            (using Devel)
Installed from:    Compiled sources

To reproduce the crash:
visit: http://dictionnaire.reverso.net/
enter something in the traduction field, like "test".
Click on the arrow button to translate (under the searchfield).

First you will notice that the website does not translate/work (this is probably not the actual bug). When you now click allot of times on that button in the hope that it suddenly starts to work, konqueror crashes.

For me it happend only after 50 fast clicks, for my girlfriend after only 10, so this seems to be a timing issue.

Here is the backtrace from a recent trunk (23.04.2009):

Application: Konqueror (konqueror), signal SIGSEGV
[Current thread is 0 (LWP 4778)]

Thread 2 (Thread 0xb2b5ab90 (LWP 4788)):
#0  0xb7f5a430 in __kernel_vsyscall ()
#1  0xb65467b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb72c43ed in QProcessManager::run (this=0x8258560) at io/qprocess_unix.cpp:305
#3  0xb71ec65b in QThreadPrivate::start (arg=0x8258560) at thread/qthread_unix.cpp:189
#4  0xb71664ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb654e49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5fa1920 (LWP 4778)):
[KCrash Handler]
#6  DOM::NodeImpl::positionForCoordinates (this=0x0, x=634, y=261) at /home/kde-devel/kde/src/kdelibs/khtml/xml/dom_nodeimpl.h:364
#7  0xb4152d82 in KHTMLPart::khtmlMouseReleaseEvent (this=0x8259238, event=0xbf9761b4) at /home/kde-devel/kde/src/kdelibs/khtml/khtml_part.cpp:6409
#8  0xb4122aaf in KHTMLPart::customEvent (this=0x8259238, event=0xbf9761b4) at /home/kde-devel/kde/src/kdelibs/khtml/khtml_part.cpp:5908
#9  0xb72f6d71 in QObject::event (this=0x8259238, e=0xbf9761b4) at kernel/qobject.cpp:1149
#10 0xb69a60d3 in QApplicationPrivate::notify_helper (this=0x8254f88, receiver=0x8259238, e=0xbf9761b4) at kernel/qapplication.cpp:4084
#11 0xb69a6448 in QApplication::notify (this=0xbf9773e8, receiver=0x8259238, e=0xbf9761b4) at kernel/qapplication.cpp:3631
#12 0xb785024d in KApplication::notify (this=0xbf9773e8, receiver=0x8259238, event=0xbf9761b4) at /home/kde-devel/kde/src/kdelibs/kdeui/kernel/kapplication.cpp:307
#13 0xb72e25df in QCoreApplication::notifyInternal (this=0xbf9773e8, receiver=0x8259238, event=0xbf9761b4) at kernel/qcoreapplication.cpp:598
#14 0xb4112336 in KHTMLView::mouseReleaseEvent (this=0x8298990, _mouse=0xbf976938) at /home/kde-devel/qt-copy/include/QtCore/qcoreapplication.h:213
#15 0xb6a069c2 in QWidget::event (this=0x8298990, event=0xbf976938) at kernel/qwidget.cpp:7516
#16 0xb6defc78 in QFrame::event (this=0x8298990, e=0xbf976938) at widgets/qframe.cpp:559
#17 0xb4110b8f in KHTMLView::widgetEvent (this=0x8298990, e=0xbf976938) at /home/kde-devel/kde/src/kdelibs/khtml/khtmlview.cpp:2319
#18 0xb4110dcd in KHTMLView::eventFilter (this=0x8298990, o=0x82a4d68, e=0xbf976938) at /home/kde-devel/kde/src/kdelibs/khtml/khtmlview.cpp:2183
#19 0xb72e09b0 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x8254f88, receiver=0x82a4d68, event=0xbf976938) at kernel/qcoreapplication.cpp:718
#20 0xb69a60b0 in QApplicationPrivate::notify_helper (this=0x8254f88, receiver=0x82a4d68, e=0xbf976938) at kernel/qapplication.cpp:4080
#21 0xb69a6d33 in QApplication::notify (this=0xbf9773e8, receiver=0x82a4d68, e=0xbf976938) at kernel/qapplication.cpp:3786
#22 0xb785024d in KApplication::notify (this=0xbf9773e8, receiver=0x82a4d68, event=0xbf976938) at /home/kde-devel/kde/src/kdelibs/kdeui/kernel/kapplication.cpp:307
#23 0xb72e25df in QCoreApplication::notifyInternal (this=0xbf9773e8, receiver=0x82a4d68, event=0xbf976938) at kernel/qcoreapplication.cpp:598
#24 0xb69b1c93 in QCoreApplication::sendSpontaneousEvent (receiver=0x82a4d68, event=0xbf976938) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#25 0xb69aadb6 in QApplicationPrivate::sendMouseEvent (receiver=0x82a4d68, event=0xbf976938, alienWidget=0x82a4d68, nativeWidget=0x8339e10, buttonDown=0xb715dc80, lastMouseReceiver=@0xb715dc84)
    at kernel/qapplication.cpp:2940
#26 0xb6a282e3 in QETWidget::translateMouseEvent (this=0x8339e10, event=0xbf976f4c) at kernel/qapplication_x11.cpp:4425
#27 0xb6a2937b in QApplication::x11ProcessEvent (this=0xbf9773e8, event=0xbf976f4c) at kernel/qapplication_x11.cpp:3421
#28 0xb6a54dc0 in x11EventSourceDispatch (s=0x8258068, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0xb629db88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0xb62a10eb in ?? () from /usr/lib/libglib-2.0.so.0
#31 0xb62a1268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0xb7311416 in QEventDispatcherGlib::processEvents (this=0x823cec0, flags={i = -1080594172}) at kernel/qeventdispatcher_glib.cpp:323
#33 0xb6a545b8 in QGuiEventDispatcherGlib::processEvents (this=0x823cec0, flags={i = -1080594124}) at kernel/qguieventdispatcher_glib.cpp:202
#34 0xb72df5d0 in QEventLoop::processEvents (this=0xbf9771c0, flags={i = -1080594048}) at kernel/qeventloop.cpp:149
#35 0xb72df82a in QEventLoop::exec (this=0xbf9771c0, flags={i = -1080593976}) at kernel/qeventloop.cpp:196
#36 0xb72e2db7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#37 0xb69a5dec in QApplication::exec () at kernel/qapplication.cpp:3553
#38 0xb7f3e77f in kdemain (argc=1, argv=0xbf977764) at /home/kde-devel/kde/src/kdebase/apps/konqueror/src/konqmain.cpp:257
#39 0x08048762 in main (argc=0, argv=0x0) at /home/kde-devel/kde/build/kdebase/apps/konqueror/src/konqueror_dummy.cpp:3