Application that crashed: kontact
Version of the application: 4.3.0
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-14-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
The only thing I did was clicking on the button to select the TODO view. Kontact crashed right after that.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f06920962d8 in KOTodoModel::rowCount (this=0x4ff9930, parent=@0x7fffc406b548) at /usr/include/qt4/QtCore/qlist.h:87
#6  0x00007f069209615c in KOTodoModel::index (this=0x4ff9930, row=1, column=0, parent=@0x7fffc406b548) at /build/buildd/kdepim-4.3.0/korganizer/views/todoview/kotodomodel.cpp:605
#7  0x00007f06b76b4a2d in QAlgorithmsPrivate::qMerge<int*, int const, QSortFilterProxyModelGreaterThan> (begin=0x511afa0, pivot=<value optimized out>, end=0x511afa8, t=@0x511afa0, lessThan=
      {sort_column = -1006193344, source_parent = {r = -1006193760, c = 32767, p = 0x7fffc406b548, m = 0x2}, source_model = 0x511c970, proxy_model = 0x7f06b65d6480})
    at itemviews/qsortfilterproxymodel.cpp:92
#8  0x00007f06b76b5098 in QAlgorithmsPrivate::qStableSortHelper<int*, int, QSortFilterProxyModelGreaterThan> (begin=0x511afa0, end=0x511afa8, t=@0x511afa0, lessThan=
      {sort_column = -1006193056, source_parent = {r = 0, c = 0, p = 0x1, m = 0x7fffc406b548}, source_model = 0x4ff9930, proxy_model = 0x511afa8})
    at ../../include/QtCore/../../src/corelib/tools/qalgorithms.h:487
#9  0x00007f06b76b4fde in QAlgorithmsPrivate::qStableSortHelper<int*, int, QSortFilterProxyModelGreaterThan> (begin=0x511afa0, end=0x511afb0, t=@0x511afa0, lessThan=
      {sort_column = -1006192896, source_parent = {r = 0, c = 0, p = 0x1, m = 0x7fffc406b548}, source_model = 0x4ff9930, proxy_model = 0x511afb0})
    at ../../include/QtCore/../../src/corelib/tools/qalgorithms.h:485
#10 0x00007f06b76adf1a in QSortFilterProxyModelPrivate::sort_source_rows (this=<value optimized out>, source_rows=@0x511b840, source_parent=<value optimized out>)
    at ../../include/QtCore/../../src/corelib/tools/qalgorithms.h:229
#11 0x00007f06b76afc01 in QSortFilterProxyModelPrivate::sort (this=0x501b5c0) at itemviews/qsortfilterproxymodel.cpp:362
#12 0x00007f06b76b1cfa in QSortFilterProxyModel::qt_metacall (this=0x4ff8d00, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc406b960)
    at .moc/release-shared/moc_qsortfilterproxymodel.cpp:126
#13 0x00007f069209e625 in KOTodoViewSortFilterProxyModel::qt_metacall (this=0x4ff9930, _c=3288773960, _id=1, _a=0x0)
    at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/korganizer/kotodoviewsortfilterproxymodel.moc:62
#14 0x00007f06b65cbea2 in QMetaObject::activate (sender=0x4ff9930, from_signal_index=<value optimized out>, to_signal_index=9, argv=0x0) at kernel/qobject.cpp:3113
#15 0x00007f06b6602864 in QAbstractItemModel::rowsInserted (this=0x4ff9930, _t1=<value optimized out>, _t2=0, _t3=0) at .moc/release-shared/moc_qabstractitemmodel.cpp:159
#16 0x00007f06b65b18e5 in QAbstractItemModel::endInsertRows (this=0x4ff9930) at kernel/qabstractitemmodel.cpp:2081
#17 0x00007f0692097f33 in KOTodoModel::insertTodo (this=0x4ff9930, todo=0x7f0694d31260, checkRelated=<value optimized out>) at /build/buildd/kdepim-4.3.0/korganizer/views/todoview/kotodomodel.cpp:537
#18 0x00007f06920982c8 in KOTodoModel::insertTodo (this=0x4ff9930, todo=0x7f0694c4ccf0, checkRelated=<value optimized out>) at /build/buildd/kdepim-4.3.0/korganizer/views/todoview/kotodomodel.cpp:516
#19 0x00007f0692099134 in KOTodoModel::reloadTodos (this=0x4ff9930) at /build/buildd/kdepim-4.3.0/korganizer/views/todoview/kotodomodel.cpp:234
#20 0x00007f06920bc230 in CalendarView::updateView (this=0x4fff3a0, start=@0x3a4ea18, end=@0x3a4ea48, updateTodos=false) at /build/buildd/kdepim-4.3.0/korganizer/calendarview.cpp:798
#21 0x00007f06920be1e1 in CalendarView::updateView (this=0x4fff3a0) at /build/buildd/kdepim-4.3.0/korganizer/calendarview.cpp:810
#22 0x00007f06920cd8ad in KOViewManager::showView (this=0x4fffdd0, view=<value optimized out>) at /build/buildd/kdepim-4.3.0/korganizer/koviewmanager.cpp:162
#23 0x00007f06920cde68 in KOViewManager::showTodoView (this=0x4fffdd0) at /build/buildd/kdepim-4.3.0/korganizer/koviewmanager.cpp:494
#24 0x00007f06921549b6 in CalendarAdaptor::qt_metacall (this=0x507cf30, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc406c270)
    at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/korganizer/calendaradaptor.cpp:135
#25 0x00007f06b68d0453 in QDBusConnectionPrivate::deliverCall (this=0x1f6b790, object=0x507cf30, msg=@0x7fffc406c9f0, metaTypes=@0x7fffc406c378, slotIdx=20) at qdbusintegrator.cpp:891
#26 0x00007f06b68d166f in QDBusConnectionPrivate::activateCall (this=0x1f6b790, object=0x507cf30, flags=273, msg=@0x7fffc406c9f0) at qdbusintegrator.cpp:796
#27 0x00007f06b68d1da1 in QDBusConnectionPrivate::activateObject (this=0x1f6b790, node=@0x7fffc406c5e0, msg=@0x7fffc406c9f0, pathStartPos=<value optimized out>) at qdbusintegrator.cpp:1347
#28 0x00007f06b68d269d in QDBusConnectionPrivate::handleObjectCall (this=0x1f6b790, msg=@0x7fffc406c9f0) at qdbusintegrator.cpp:1443
#29 0x00007f06b68d2bbd in QDBusConnectionPrivate::handleMessage (this=0x1f6b790, amsg=@0x7fffc406c9f0) at qdbusintegrator.cpp:535
#30 0x00007f06b68d31bc in QDBusConnectionPrivate::sendWithReplyLocal (this=0x1f6b790, message=@0x7fffc406cd60) at qdbusintegrator.cpp:1797
#31 0x00007f06b68d4268 in QDBusConnectionPrivate::sendWithReplyAsync (this=0x1f6b790, message=@0x7fffc406cd60, timeout=<value optimized out>) at qdbusintegrator.cpp:1832
#32 0x00007f06b68bc5e0 in QDBusConnection::asyncCall (this=<value optimized out>, message=@0x8010001b4, timeout=0) at qdbusconnection.cpp:542
#33 0x00007f06b68dc25b in QDBusAbstractInterface::asyncCallWithArgumentList (this=<value optimized out>, method=@0x7fffc406cdc0, args=@0x7fffc406cdd0) at qdbusabstractinterface.cpp:430
#34 0x00007f06a6184e45 in TodoPlugin::select (this=<value optimized out>) at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/plugins/korganizer/calendarinterface.h:152
#35 0x00007f06bafec50d in Kontact::MainWindow::selectPlugin (this=0x20e26a0, plugin=0x2417c70) at /build/buildd/kdepim-4.3.0/kontact/src/mainwindow.cpp:793
#36 0x00007f06baff0572 in Kontact::MainWindow::qt_metacall (this=0x20e26a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc406d360)
    at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/mainwindow.moc:107
#37 0x00007f06b65cbea2 in QMetaObject::activate (sender=0x1f90d50, from_signal_index=<value optimized out>, to_signal_index=27, argv=0x0) at kernel/qobject.cpp:3113
#38 0x00007f06baff1a4f in Kontact::SidePaneBase::pluginSelected (this=0x4ff9930, _t1=0x2417c70) at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/sidepanebase.moc:84
#39 0x00007f06baff1adf in Kontact::SidePaneBase::qt_metacall (this=0x1f90d50, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fffc406d4b0)
    at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/sidepanebase.moc:71
#40 0x00007f06baff1cae in Kontact::IconSidePane::qt_metacall (this=0x4ff9930, _c=3288773960, _id=1, _a=0x0) at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:133
#41 0x00007f06b65cbea2 in QMetaObject::activate (sender=0x1f914e0, from_signal_index=<value optimized out>, to_signal_index=70, argv=0x0) at kernel/qobject.cpp:3113
#42 0x00007f06baff1d5f in Kontact::Navigator::pluginActivated (this=0x4ff9930, _t1=0x2417c70) at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:90
#43 0x00007f06baff2525 in Kontact::Navigator::qt_metacall (this=0x1f914e0, _c=QMetaObject::InvokeMetaMethod, _id=16777652, _a=0x7fffc406d5d0)
    at /build/buildd/kdepim-4.3.0/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:76
#44 0x00007f06b65cbea2 in QMetaObject::activate (sender=0x1f85200, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x0) at kernel/qobject.cpp:3113
#45 0x00007f06b76750ea in QItemSelectionModel::currentChanged (this=0x4ff9930, _t1=<value optimized out>, _t2=<value optimized out>) at .moc/release-shared/moc_qitemselectionmodel.cpp:153
#46 0x00007f06b7675234 in QItemSelectionModel::setCurrentIndex (this=0x1f85200, index=<value optimized out>, command={i = -1006184464}) at itemviews/qitemselectionmodel.cpp:1123
#47 0x00007f06b7629c10 in QAbstractItemView::mousePressEvent (this=0x1f914e0, event=0x7fffc406e380) at itemviews/qabstractitemview.cpp:1514
#48 0x00007f06b7186296 in QWidget::event (this=0x1f914e0, event=0x7fffc406e380) at kernel/qwidget.cpp:7545
#49 0x00007f06b74f8f0b in QFrame::event (this=0x1f914e0, e=0x7fffc406e380) at widgets/qframe.cpp:559
#50 0x00007f06b762ec0d in QAbstractItemView::viewportEvent (this=0x1f914e0, event=0x7fffc406e380) at itemviews/qabstractitemview.cpp:1476
#51 0x00007f06b65b59b8 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x1f929c0, event=0x7fffc406e380) at kernel/qcoreapplication.cpp:726
#52 0x00007f06b7134f1c in QApplicationPrivate::notify_helper (this=0x1f7f860, receiver=0x1f929c0, e=0x7fffc406e380) at kernel/qapplication.cpp:4052
#53 0x00007f06b713d8ea in QApplication::notify (this=<value optimized out>, receiver=0x1f929c0, e=0x7fffc406e380) at kernel/qapplication.cpp:3758
#54 0x00007f06b853971b in KApplication::notify (this=0x7fffc40702d0, receiver=0x1f929c0, event=0x7fffc406e380) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#55 0x00007f06b65b66ac in QCoreApplication::notifyInternal (this=0x7fffc40702d0, receiver=0x1f929c0, event=0x7fffc406e380) at kernel/qcoreapplication.cpp:610
#56 0x00007f06b713cb38 in QApplicationPrivate::sendMouseEvent (receiver=0x1f929c0, event=0x7fffc406e380, alienWidget=0x1f929c0, nativeWidget=0x1f90d50, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f06b7b6c010) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#57 0x00007f06b71a6b19 in QETWidget::translateMouseEvent (this=0x1f90d50, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#58 0x00007f06b71a5b53 in QApplication::x11ProcessEvent (this=0x7fffc40702d0, event=0x7fffc406ff00) at kernel/qapplication_x11.cpp:3550
#59 0x00007f06b71ce454 in x11EventSourceDispatch (s=0x1f78130, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#60 0x00007f06afd0720a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#61 0x00007f06afd0a8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#62 0x00007f06afd0aa7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#63 0x00007f06b65dfa8f in QEventDispatcherGlib::processEvents (this=0x1f4e0a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#64 0x00007f06b71cdbdf in QGuiEventDispatcherGlib::processEvents (this=0x4ff9930, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#65 0x00007f06b65b4f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1006173712}) at kernel/qeventloop.cpp:149
#66 0x00007f06b65b5314 in QEventLoop::exec (this=0x7fffc4070230, flags={i = -1006173632}) at kernel/qeventloop.cpp:201
#67 0x00007f06b65b75e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#68 0x0000000000404945 in main (argc=1, argv=0x7fffc40709b8) at /build/buildd/kdepim-4.3.0/kontact/src/main.cpp:218

Reported using DrKonqi