Application that crashed: konqueror
Version of the application: 4.3.4 (KDE 4.3.4)
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.32-trunk-amd64 x86_64
Distribution: Debian GNU/Linux 4.0r8 (etch)

What I was doing when the application crashed:
The issue started (without a crash) while scrolling (or attempting to scroll) with the mouse wheel across the science page on http://www.spiegel.de. The image stalled. I could use the slider, or use the wheel, the slider moved, but the image did not.

I close the tab, looked at other web pages in another tab, with working vertical sliders, continued using konqueror for a few minutes just normally, when another page was not scrollable any more. This time, the tab could not be closed. Changing to antoher tab worked, though. Konqueror crashed while attempting to close the broken tab with the mouse from another working tab being active, having tried to close the broken tab while it was active (but non-closing) before.

Good luck!

 -- Backtrace:
Application: Konqueror (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x00007f2e788614f3 in __dynamic_cast () from /usr/lib/libstdc++.so.6
#6  0x00007f2e6fb2a10e in KonqMainWindow::slotAddClosedUrl (this=0x22a72b0, tab=0x287deb8) at ../../../../apps/konqueror/src/konqmainwindow.cpp:5186
#7  0x00007f2e6fb37885 in KonqMainWindow::qt_metacall (this=0x22a72b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffff297640) at ./konqmainwindow.moc:379
#8  0x00007f2e7ad18df2 in QMetaObject::activate (sender=0x22a9cb0, from_signal_index=<value optimized out>, to_signal_index=10, argv=0x28) at kernel/qobject.cpp:3112
#9  0x00007f2e6fae27af in KonqViewManager::aboutToRemoveTab (this=0x287deb8, _t1=0x287deb8) at ./konqviewmanager.moc:106
#10 0x00007f2e6fae3383 in KonqViewManager::removeTab (this=0x22a9cb0, currentFrame=0x287deb8, emitAboutToRemoveSignal=true) at ../../../../apps/konqueror/src/konqviewmanager.cpp:393
#11 0x00007f2e6fb37b5d in KonqMainWindow::qt_metacall (this=0x22a72b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffff2978c0) at ./konqmainwindow.moc:417
#12 0x00007f2e7ad18df2 in QMetaObject::activate (sender=0x3d89a40, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x28) at kernel/qobject.cpp:3112
#13 0x00007f2e7ad1df5f in QSingleShotTimer::timerEvent (this=0x3d89a40) at kernel/qtimer.cpp:298
#14 0x00007f2e7ad13353 in QObject::event (this=0x3d89a40, e=0x7f2e6fd887e0) at kernel/qobject.cpp:1074
#15 0x00007f2e78c8401d in QApplicationPrivate::notify_helper (this=0x21cbed0, receiver=0x3d89a40, e=0x7fffff297f80) at kernel/qapplication.cpp:4065
#16 0x00007f2e78c8c07a in QApplication::notify (this=0x7fffff298420, receiver=0x3d89a40, e=0x7fffff297f80) at kernel/qapplication.cpp:4030
#17 0x00007f2e798dbe06 in KApplication::notify (this=0x7fffff298420, receiver=0x3d89a40, event=0x7fffff297f80) at ../../kdeui/kernel/kapplication.cpp:302
#18 0x00007f2e7ad03c9c in QCoreApplication::notifyInternal (this=0x7fffff298420, receiver=0x3d89a40, event=0x7fffff297f80) at kernel/qcoreapplication.cpp:610
#19 0x00007f2e7ad302c6 in QCoreApplication::sendEvent (this=0x21cfb40) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 QTimerInfoList::activateTimers (this=0x21cfb40) at kernel/qeventdispatcher_unix.cpp:580
#21 0x00007f2e7ad2c658 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f2e77b9a8fe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#24 0x00007f2e77b9e2b8 in ?? () from /lib/libglib-2.0.so.0
#25 0x00007f2e77b9e3e0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#26 0x00007f2e7ad2c39c in QEventDispatcherGlib::processEvents (this=0x2145850, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#27 0x00007f2e78d1af1f in QGuiEventDispatcherGlib::processEvents (this=0x287deb8, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#28 0x00007f2e7ad02562 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f2e7ad02934 in QEventLoop::exec (this=0x7fffff298230, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f2e7ad04ba4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#31 0x00007f2e6fb63a13 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/konqueror/src/konqmain.cpp:257
#32 0x0000000000406e9e in launch (argc=3, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=24, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a057 "0") at ../../kinit/kinit.cpp:677
#33 0x0000000000407aad in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#34 0x0000000000407f91 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#35 0x00000000004086c6 in main (argc=2, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi