Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-desktop-1mnb i686
Distribution: "Mandriva Linux 2010.0"

What I was doing when the application crashed:
In the KOrganizer todo part of Kontact, trying to delete finished tasks crashs Kontact.
If the KOrganizer app is started alone, I can delete these tasks but it shows a warning about non-finished subtasks... I don't have any subtask.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb51977eb in KCal::IncidenceBase::uid (this=0x9d43dd8) at /usr/lib/qt4/include/QtCore/qstring.h:711
#7  0xb51c8c6c in KCal::Calendar::removeRelations (this=0x9d03470, incidence=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/calendar.cpp:873
#8  0xb51cc78a in KCal::CalendarLocal::deleteTodo (this=0x9d03470, todo=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/calendarlocal.cpp:267
#9  0xb52225c6 in KCal::ResourceCached::deleteTodo (this=0x9d384a8, todo=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/resourcecached.cpp:288
#10 0xb522d2f4 in KCal::CalendarResources::deleteTodo (this=0x9ce39b0, todo=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/calendarresources.cpp:521
#11 0xb51c93fd in KCal::Incidence::DeleteVisitor<KCal::Calendar>::visit (this=0xbfc4a578, t=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/incidence.h:123
#12 0xb51a3377 in KCal::Todo::accept (this=0xa055eb8, v=@0xbfc4a578) at /usr/src/debug/kdepimlibs-4.3.2/kcal/todo.h:381
#13 0xb51c1709 in KCal::Calendar::deleteIncidence (this=0x9ce39b0, incidence=0xa055eb8) at /usr/src/debug/kdepimlibs-4.3.2/kcal/calendar.cpp:438
#14 0xafd50acf in IncidenceChanger::deleteIncidence (this=0x9fc5cb0, incidence=0xa055eb8) at /usr/src/debug/kdepim-4.3.2/korganizer/incidencechanger.cpp:113
#15 0xafca658f in CalendarView::purgeCompletedSubTodos (this=0x9c52fe8, todo=0xa055eb8, allPurged=@0xbfc4a72f) at /usr/src/debug/kdepim-4.3.2/korganizer/calendarview.cpp:2355
#16 0xafcb0bf5 in CalendarView::purgeCompleted (this=0x9c52fe8) at /usr/src/debug/kdepim-4.3.2/korganizer/calendarview.cpp:2390
#17 0xafcb71d1 in CalendarView::qt_metacall (this=0x9c52fe8, _c=QMetaObject::InvokeMetaMethod, _id=167, _a=0xbfc4a8f8) at /usr/src/debug/kdepim-4.3.2/build/korganizer/calendarview.moc:564
#18 0xb6fd1144 in QMetaObject::activate (sender=0xa018f18, from_signal_index=5, to_signal_index=6, argv=0xbfc4a8f8) at kernel/qobject.cpp:3112
#19 0xb6fd1621 in QMetaObject::activate (sender=0xa018f18, m=0xb6e5ef08, from_local_signal_index=1, to_local_signal_index=2, argv=0xbfc4a8f8) at kernel/qobject.cpp:3206
#20 0xb65dae55 in QAction::triggered (this=0xa018f18, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#21 0xb65dc482 in QAction::activate (this=0xa018f18, event=QAction::Trigger) at kernel/qaction.cpp:1167
#22 0xb6a39a87 in QMenuPrivate::activateCausedStack (this=0x9a40b08, causedStack=@0xbfc4a9fc, action=0xa018f18, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:967
#23 0xb6a403b8 in QMenuPrivate::activateAction (this=0x9a40b08, action=0xa018f18, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1060
#24 0xb6a40f58 in QMenu::mouseReleaseEvent (this=0x99cc330, e=0xbfc4b000) at widgets/qmenu.cpp:2259
#25 0xb75e5c9d in KMenu::mouseReleaseEvent (this=0x99cc330, e=0xbfc4b000) at /usr/src/debug/kdelibs-4.3.2/kdeui/widgets/kmenu.cpp:456
#26 0xb663890c in QWidget::event (this=0x99cc330, event=0xbfc4b000) at kernel/qwidget.cpp:7554
#27 0xb6a431f4 in QMenu::event (this=0x99cc330, e=0xbfc4b000) at widgets/qmenu.cpp:2358
#28 0xb65e168c in QApplicationPrivate::notify_helper (this=0x97a53e0, receiver=0x99cc330, e=0xbfc4b000) at kernel/qapplication.cpp:4065
#29 0xb65e993b in QApplication::notify (this=0x99cc330, receiver=0x99cc330, e=0xbfc4b000) at kernel/qapplication.cpp:3767
#30 0xb74f59e1 in KApplication::notify (this=0xbfc4c984, receiver=0x99cc330, event=0xbfc4b000) at /usr/src/debug/kdelibs-4.3.2/kdeui/kernel/kapplication.cpp:302
#31 0xb6fbac0e in QCoreApplication::notifyInternal (this=0xbfc4c984, receiver=0x99cc330, event=0xbfc4b000) at kernel/qcoreapplication.cpp:610
#32 0xb65e895c in QApplicationPrivate::sendMouseEvent (receiver=0x99cc330, event=0xbfc4b000, alienWidget=0x0, nativeWidget=0x99cc330, buttonDown=0xb6e77a60, lastMouseReceiver=@0xb6e77a64)
    at ../../src/corelib/kernel/qcoreapplication.h:216
#33 0xb66599f6 in QETWidget::translateMouseEvent (this=0x99cc330, event=0xbfc4c62c) at kernel/qapplication_x11.cpp:4345
#34 0xb6658aee in QApplication::x11ProcessEvent (this=0xbfc4c984, event=0xbfc4c62c) at kernel/qapplication_x11.cpp:3430
#35 0xb6683d88 in x11EventSourceDispatch (s=0x9795fb0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0xb4913b92 in IA__g_main_context_dispatch (context=0x979fea0) at gmain.c:1960
#37 0xb4917468 in g_main_context_iterate (context=0x979fea0, block=<value optimized out>, dispatch=1, self=0x97a3cd8) at gmain.c:2591
#38 0xb491758e in IA__g_main_context_iteration (context=0x979fea0, may_block=1) at gmain.c:2654
#39 0xb6fe68f1 in QEventDispatcherGlib::processEvents (this=0x97a5ce0, flags={i = 36}) at kernel/qeventdispatcher_glib.cpp:406
#40 0xb66834ba in QGuiEventDispatcherGlib::processEvents (this=0x97a5ce0, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#41 0xb6fb926d in QEventLoop::processEvents (this=0xbfc4c8e4, flags=) at kernel/qeventloop.cpp:149
#42 0xb6fb96b9 in QEventLoop::exec (this=0xbfc4c8e4, flags={i = 0}) at kernel/qeventloop.cpp:201
#43 0xb6fbbb50 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#44 0xb65e1504 in QApplication::exec () at kernel/qapplication.cpp:3525
#45 0x0804b1c6 in main (argc=2, argv=0xbfc4cba4) at /usr/src/debug/kdepim-4.3.2/kontact/src/main.cpp:218

Reported using DrKonqi