Application: konqueror (4.4.2 (KDE 4.4.2))
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-23-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I had chosen "Forward" an email to others in my hotmail inbox and when it loaded it, I tried to delete some web addresses of former destinations. When I pressed "delete", Konqueror crashed.
It was the only tab open and as far as I am aware I have not changed any property except History is deleted.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Konqueror (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fb2e2527760 (LWP 6251))]

Thread 2 (Thread 0x7fb2bff84710 (LWP 6343)):
#0  0x00007fb2df523f83 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fb2dbee84a9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007fb2dbee88fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007fb2e0b2c566 in QEventDispatcherGlib::processEvents (this=0x309dae0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007fb2e0b01992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007fb2e0b01d6c in QEventLoop::exec (this=0x7fb2bff83db0, flags=) at kernel/qeventloop.cpp:201
#6  0x00007fb2e0a0bd59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007fb2e0ae2178 in QInotifyFileSystemWatcherEngine::run (this=0x2edf320) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fb2e0a0e775 in QThreadPrivate::start (arg=0x2edf320) at thread/qthread_unix.cpp:248
#9  0x00007fb2e077e9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007fb2df5306fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb2e2527760 (LWP 6251)):
[KCrash Handler]
#5  khtml::InputNewlineCommandImpl::doApply (this=0x4c4d4d0) at ../../khtml/editing/htmlediting_impl.cpp:1635
#6  0x00007fb2cd0bd15a in khtml::EditCommandImpl::apply (this=0x1fb5470) at ../../khtml/editing/htmlediting_impl.cpp:238
#7  0x00007fb2cd0c2e3f in khtml::CompositeEditCommandImpl::applyCommandToComposite (this=0x4d99cc0, cmd=) at ../../khtml/editing/htmlediting_impl.cpp:353
#8  0x00007fb2cd0c68cc in khtml::TypingCommandImpl::insertNewline (this=0x4d99cc0) at ../../khtml/editing/htmlediting_impl.cpp:2596
#9  0x00007fb2cd0c6a80 in khtml::TypingCommandImpl::insertNewline0 (document=0x32c7450) at ../../khtml/editing/htmlediting_impl.cpp:2701
#10 0x00007fb2cd0bb1ad in DOM::Editor::handleKeyEvent (this=0x4fee530, _ke=0x4d9a800) at ../../khtml/editing/editor.cpp:551
#11 0x00007fb2ccf457d2 in DOM::ElementImpl::defaultEventHandler (this=0x32c70e0, e=0x4e575d0) at ../../khtml/xml/dom_elementimpl.cpp:835
#12 0x00007fb2ccf3c864 in DOM::NodeImpl::dispatchGenericEvent (this=0x32c70e0, evt=0x4e575d0) at ../../khtml/xml/dom_nodeimpl.cpp:526
#13 0x00007fb2ccf3ca5e in DOM::NodeImpl::dispatchEvent (this=0x32c70e0, evt=0x4e575d0, exceptioncode=@0x7fff22b12cfc, tempEvent=true) at ../../khtml/xml/dom_nodeimpl.cpp:453
#14 0x00007fb2ccf3d362 in DOM::NodeImpl::dispatchKeyEvent (this=<value optimized out>, key=0x34886e0, keypress=<value optimized out>) at ../../khtml/xml/dom_nodeimpl.cpp:694
#15 0x00007fb2ccead10d in KHTMLView::dispatchKeyEvent (this=0x30072c0, _ke=0x34886e0) at ../../khtml/khtmlview.cpp:1638
#16 0x00007fb2cceb88e9 in KHTMLView::keyPressEvent (this=0x30072c0, _ke=0x34886e0) at ../../khtml/khtmlview.cpp:1762
#17 0x00007fb2cd025a66 in khtml::RenderWidget::handleEvent (this=0x26c64f8, ev=...) at ../../khtml/rendering/render_replaced.cpp:1151
#18 0x00007fb2ccf98334 in DOM::HTMLFrameElementImpl::defaultEventHandler (this=0x2899ec0, e=0x4e42440) at ../../khtml/html/html_baseimpl.cpp:297
#19 0x00007fb2ccf3c864 in DOM::NodeImpl::dispatchGenericEvent (this=0x2899ed0, evt=0x4e42440) at ../../khtml/xml/dom_nodeimpl.cpp:526
#20 0x00007fb2ccf3ca5e in DOM::NodeImpl::dispatchEvent (this=0x2899ed0, evt=0x4e42440, exceptioncode=@0x7fff22b131cc, tempEvent=true) at ../../khtml/xml/dom_nodeimpl.cpp:453
#21 0x00007fb2ccf3d362 in DOM::NodeImpl::dispatchKeyEvent (this=<value optimized out>, key=0x7fff22b13db0, keypress=<value optimized out>) at ../../khtml/xml/dom_nodeimpl.cpp:694
#22 0x00007fb2ccead10d in KHTMLView::dispatchKeyEvent (this=0x2506e80, _ke=0x7fff22b13db0) at ../../khtml/khtmlview.cpp:1638
#23 0x00007fb2cceb88e9 in KHTMLView::keyPressEvent (this=0x2506e80, _ke=0x7fff22b13db0) at ../../khtml/khtmlview.cpp:1762
#24 0x00007fb2dfcf522e in QWidget::event (this=0x2506e80, event=0x7fff22b13db0) at kernel/qwidget.cpp:8033
#25 0x00007fb2e009c4e6 in QFrame::event (this=0x2506e80, e=0x7fff22b13db0) at widgets/qframe.cpp:557
#26 0x00007fb2e01278ab in QAbstractScrollArea::event (this=0x2506e80, e=0x7fff22b13db0) at widgets/qabstractscrollarea.cpp:989
#27 0x00007fb2cceb5f57 in KHTMLView::event (this=0x2506e80, e=<value optimized out>) at ../../khtml/khtmlview.cpp:552
#28 0x00007fb2dfc9f22c in QApplicationPrivate::notify_helper (this=0x1fcd7c0, receiver=0x2506e80, e=0x7fff22b13db0) at kernel/qapplication.cpp:4300
#29 0x00007fb2dfca6ec5 in QApplication::notify (this=<value optimized out>, receiver=0x2506e80, e=0x7fff22b13db0) at kernel/qapplication.cpp:3763
#30 0x00007fb2e104a526 in KApplication::notify (this=0x7fff22b14fb0, receiver=0x2506e80, event=0x7fff22b13db0) at ../../kdeui/kernel/kapplication.cpp:302
#31 0x00007fb2e0b0306c in QCoreApplication::notifyInternal (this=0x7fff22b14fb0, receiver=0x2506e80, event=0x7fff22b13db0) at kernel/qcoreapplication.cpp:704
#32 0x00007fb2dfd4a16a in QKeyMapper::sendKeyEvent (keyWidget=0x2506e80, grab=<value optimized out>, type=QEvent::KeyPress, code=16777220, modifiers=<value optimized out>, text=..., 
    autorepeat=false, count=1, nativeScanCode=36, nativeVirtualKey=65293, nativeModifiers=8208) at kernel/qkeymapper_x11.cpp:1861
#33 0x00007fb2dfd4c6f0 in QKeyMapperPrivate::translateKeyEvent (this=0x7fff22b13f90, keyWidget=0x2506e80, event=<value optimized out>, grab=true) at kernel/qkeymapper_x11.cpp:1831
#34 0x00007fb2dfd23904 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff22b14980) at kernel/qapplication_x11.cpp:3394
#35 0x00007fb2dfd4f882 in x11EventSourceDispatch (s=0x1f87830, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007fb2dbee48c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#37 0x00007fb2dbee8748 in ?? () from /lib/libglib-2.0.so.0
#38 0x00007fb2dbee88fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#39 0x00007fb2e0b2c513 in QEventDispatcherGlib::processEvents (this=0x1f45140, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#40 0x00007fb2dfd4f46e in QGuiEventDispatcherGlib::processEvents (this=0x1fb5470, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007fb2e0b01992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#42 0x00007fb2e0b01d6c in QEventLoop::exec (this=0x7fff22b14cb0, flags=) at kernel/qeventloop.cpp:201
#43 0x00007fb2e0b05aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#44 0x00007fb2d441d076 in kdemain () from /usr/lib/libkdeinit4_konqueror.so
#45 0x00000000004070f3 in launch (argc=4, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=32, envs=<value optimized out>, reset_env=true, tty=0x0, 
    avoid_loops=false, startup_id_str=0x1fa5d0f "antonis;1279027321;851669;1885_TIME0") at ../../kinit/kinit.cpp:717
#46 0x0000000000407cb0 in handle_launcher_request (sock=20, who=<value optimized out>) at ../../kinit/kinit.cpp:1209
#47 0x0000000000408219 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1393
#48 0x0000000000408e22 in main (argc=4, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1845

Reported using DrKonqi