Version:            (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages
OS:                Linux

I had lots of tabs open (about 6-7) and opened one.  While that one was opening I closed a different one.  Boom.

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1232193856 (LWP 4806)]
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[KCrash handler]
#6  0xffffe410 in __kernel_vsyscall ()
#7  0xb7d3d9a1 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb7d3f2b9 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb7f1bc07 in __gnu_cxx::__verbose_terminate_handler ()
   from /usr/lib/libstdc++.so.6
#10 0xb7f19915 in __gxx_personality_v0 () from /usr/lib/libstdc++.so.6
#11 0xb7f1994a in std::terminate () from /usr/lib/libstdc++.so.6
#12 0xb7f19fb9 in __cxa_pure_virtual () from /usr/lib/libstdc++.so.6
#13 0xb676fa3d in KonqMainWindow::slotRemoveTabPopup ()
   from /usr/lib/libkdeinit_konqueror.so
#14 0xb6791211 in KonqMainWindow::qt_invoke ()
   from /usr/lib/libkdeinit_konqueror.so
#15 0xb7284eb9 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#16 0xb761829a in QSignal::signal () from /usr/lib/libqt-mt.so.3
#17 0xb72a2630 in QSignal::activate () from /usr/lib/libqt-mt.so.3
#18 0xb73a9fb1 in QPopupMenu::mouseReleaseEvent () from /usr/lib/libqt-mt.so.3
#19 0xb72bf68d in QWidget::event () from /usr/lib/libqt-mt.so.3
#20 0xb721ae56 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#21 0xb721b3e0 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#22 0xb78f97ab in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xb71ac1c5 in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#24 0xb71a7873 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#25 0xb71a5d59 in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#26 0xb71bf4db in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#27 0xb7233947 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#28 0xb723386a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#29 0xb7219965 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#30 0xb6791c11 in kdemain () from /usr/lib/libkdeinit_konqueror.so
#31 0xb7f914f4 in kdeinitmain () from /usr/lib/kde3/konqueror.so
#32 0x0804e173 in ?? ()
#33 0x00000003 in ?? ()
#34 0x080bd2f0 in ?? ()
#35 0x00000001 in ?? ()
#36 0x00000000 in ?? ()