Here using:

Qt: 4.4.3 + qt-copy-patches-889120
KDE: 4.1.86 (KDE 4.1.86 (KDE 4.2 >= 20081221))
kdelibs svn rev. 901624 / kdebase svn rev. 901624
on ArchLinux x86_64 - Kernel 2.6.27.10

I can't reproduce the crash. Can you reproduce it with every page with a textarea inside ?

Also, bug 170643 may probably related to this. (similar backtrace and probably the same conditions)

I've just updated to r902024 and I cannot reproduce the crash anymore...

the last words... reproduced right now :-)

But it is a bit harder:

1) press CTRL+R
2) while the page is reloading right click on a text area (for example this one on bugs.kde.org

Initially I was able to reproduce even after the page was completely loaded. Now I've to right click quickly on the textarea.

About bug #170643, it could be similar, both crashes on KTextEdit::contextMenuEvent but the crash occours in different part of the code.

I'll leave a reference to this bug on bug #170643

Mh, I have reproduced it. However it doesn't occurs all the time. I had to right-click faster many times :P

Here using:

Qt: 4.4.3 + qt-copy-patches-889120
KDE: 4.1.86 (KDE 4.1.86 (KDE 4.2 >= 20081221))
kdelibs svn rev. 902031 / kdebase svn rev. 902032
on ArchLinux x86_64 - Kernel 2.6.27.10

Backtrace:

Application: Konqueror (konqueror), signal SIGSEGV
0x00007feef8607001 in nanosleep () from /lib/libc.so.6

Thread 1 (Thread 0x7feefd682750 (LWP 5326)):
[KCrash Handler]
#5  0x00007feefbcc3cde in KTextEdit::contextMenuEvent (this=0x18a0e00, event=0x7fff057c0d80) at /home/kde-devel/kde/src/KDE/kdelibs/kdeui/widgets/ktextedit.cpp:513
#6  0x00007feeee6621ad in khtml::RenderWidget::handleEvent (this=0x1812620, ev=@0xe79590) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/rendering/render_replaced.cpp:1078
#7  0x00007feeee5cd073 in DOM::HTMLGenericFormElementImpl::defaultEventHandler (this=0x1761020, evt=0xe79590) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/html/html_formimpl.cpp:1027
#8  0x00007feeee5658dc in DOM::NodeImpl::dispatchGenericEvent (this=0x1761020, evt=0xe79590) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/xml/dom_nodeimpl.cpp:524
#9  0x00007feeee565aae in DOM::NodeImpl::dispatchEvent (this=0x1761020, evt=0xe79590, exceptioncode=@0x7fff057c11dc, tempEvent=true)
    at /home/kde-devel/kde/src/KDE/kdelibs/khtml/xml/dom_nodeimpl.cpp:451
#10 0x00007feeee4c0ec1 in KHTMLView::dispatchMouseEvent (this=0xfab870, eventId=4, targetNode=0x1761020, targetNodeNonShared=<value optimized out>, cancelable=<value optimized out>, detail=1, 
    _mouse=0x7fff057c20b0, setUnder=true, mouseEventType=0, orient=0) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/khtmlview.cpp:3721
#11 0x00007feeee4ce4b3 in KHTMLView::mousePressEvent (this=0xfab870, _mouse=0x7fff057c20b0) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/khtmlview.cpp:1285
#12 0x00007feefa1b2c9a in QWidget::event (this=0xfab870, event=0x7fff057c20b0) at kernel/qwidget.cpp:7159
#13 0x00007feeee4c94bd in KHTMLView::widgetEvent (this=0xfab870, e=0x7feef8686088) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/khtmlview.cpp:2365
#14 0x00007feeee4c9774 in KHTMLView::eventFilter (this=0xfab870, o=0x10ed580, e=0x7fff057c20b0) at /home/kde-devel/kde/src/KDE/kdelibs/khtml/khtmlview.cpp:2229
#15 0x00007feefada97f7 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x10ed580, event=0x7fff057c20b0) at kernel/qcoreapplication.cpp:694
#16 0x00007feefa16007c in QApplicationPrivate::notify_helper (this=0x9542d0, receiver=0x10ed580, e=0x7fff057c20b0) at kernel/qapplication.cpp:3799
#17 0x00007feefa167c65 in QApplication::notify (this=<value optimized out>, receiver=0x10ed580, e=0x7fff057c20b0) at kernel/qapplication.cpp:3528
#18 0x00007feefbbc96bb in KApplication::notify (this=0x7fff057c2f20, receiver=0x10ed580, event=0x7fff057c20b0) at /home/kde-devel/kde/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:307
#19 0x00007feefada9d90 in QCoreApplication::notifyInternal (this=0x7fff057c2f20, receiver=0x10ed580, event=0x7fff057c20b0) at kernel/qcoreapplication.cpp:583
#20 0x00007feefa166fe2 in QApplicationPrivate::sendMouseEvent (receiver=0x10ed580, event=0x7fff057c20b0, alienWidget=0x10ed580, nativeWidget=0xb1d420, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7feefaa50450) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:212
#21 0x00007feefa1c4bec in QETWidget::translateMouseEvent (this=0xb1d420, event=<value optimized out>) at kernel/qapplication_x11.cpp:4044
#22 0x00007feefa1c3d47 in QApplication::x11ProcessEvent (this=0x7c, event=0x7fff057c2980) at kernel/qapplication_x11.cpp:3162
#23 0x00007feefa1e8724 in x11EventSourceDispatch (s=0x957930, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:142
#24 0x00007feef679daa2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007feef67a121d in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#26 0x00007feef67a13db in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007feefadd0cdf in QEventDispatcherGlib::processEvents (this=0x929170, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:319
#28 0x00007feefa1e7f7f in QGuiEventDispatcherGlib::processEvents (this=0x124e500, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:198
#29 0x00007feefada89c2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 92023920}) at kernel/qeventloop.cpp:143
#30 0x00007feefada8b55 in QEventLoop::exec (this=0x7fff057c2cb0, flags={i = 92024000}) at kernel/qeventloop.cpp:190
#31 0x00007feefadad8f7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#32 0x00007feefd37bac9 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /home/kde-devel/kde/src/KDE/kdebase/apps/konqueror/src/konqmain.cpp:257
#33 0x00007feef8586546 in __libc_start_main () from /lib/libc.so.6
#34 0x00000000004007c9 in _start ()

Cannot reproduce using current trunk r925889.

Now the problem seems really fixed :-)