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 i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Reported earlier today. Was asked to install kdepim, reproduce and resubmit. Done as instructed. Again, Kontact crashes the first time you create a TODO with a due date. If you restart the application and create it again, it works. After a while however, Kontact will crash again if you use due date on a TODO.
I have also noticed that the same thing happens in KOrganizer when creating an event with a due date OR a recurring sequence. TODOs with recurring sequence also crash...

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb721f3ec in KCal::IncidenceBase::uid () from /usr/lib/libkcal.so.4
#7  0xaad320f6 in KOEventViewer::changeIncidenceDisplay () from /usr/lib/libkorganizer_eventviewer.so.4
#8  0xaaefea6e in CalendarView::changeIncidenceDisplay () from /usr/lib/libkorganizerprivate.so.4
#9  0xaaf09ab3 in CalendarView::incidenceAdded () from /usr/lib/libkorganizerprivate.so.4
#10 0xaaf0ed6f in CalendarView::qt_metacall () from /usr/lib/libkorganizerprivate.so.4
#11 0xb5b9e1b8 in QMetaObject::activate (sender=0xaa64ff8, from_signal_index=4, to_signal_index=4, argv=0xbfe1e0ec) at kernel/qobject.cpp:3113
#12 0xb5b9ee42 in QMetaObject::activate (sender=0xaa64ff8, m=0xaada3dbc, local_signal_index=0, argv=0xbfe1e0ec) at kernel/qobject.cpp:3187
#13 0xaada1003 in KOrg::IncidenceChangerBase::incidenceAdded () from /usr/lib/libkorganizer_interfaces.so.4
#14 0xaafa220c in IncidenceChanger::addIncidence () from /usr/lib/libkorganizerprivate.so.4
#15 0xaaf1f050 in ?? () from /usr/lib/libkorganizerprivate.so.4
#16 0xaaf19b19 in ?? () from /usr/lib/libkorganizerprivate.so.4
#17 0xb6bade2c in KDialog::qt_metacall (this=0xba14738, _c=3219251648, _id=33, _a=0xba14738) at /build/buildd/kde4libs-4.3.0/obj-i486-linux-gnu/kdeui/kdialog.moc:184
#18 0xb6c7472a in KPageDialog::qt_metacall (this=0xba14738, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfe1e3ec) at /build/buildd/kde4libs-4.3.0/obj-i486-linux-gnu/kdeui/kpagedialog.moc:64
#19 0xaaf1a3fa in ?? () from /usr/lib/libkorganizerprivate.so.4
#20 0xaaf1f66a in ?? () from /usr/lib/libkorganizerprivate.so.4
#21 0xb5b9e1b8 in QMetaObject::activate (sender=0xb91ed00, from_signal_index=4, to_signal_index=4, argv=0xbfe1e3ec) at kernel/qobject.cpp:3113
#22 0xb5b9ee42 in QMetaObject::activate (sender=0xb91ed00, m=0xb5c7a878, local_signal_index=0, argv=0xbfe1e3ec) at kernel/qobject.cpp:3187
#23 0xb5ba1ab3 in QSignalMapper::mapped (this=0xb91ed00, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#24 0xb5ba233d in QSignalMapper::map (this=0xb91ed00, sender=0xac90718) at kernel/qsignalmapper.cpp:266
#25 0xb5ba252e in QSignalMapper::map (this=0xb91ed00) at kernel/qsignalmapper.cpp:257
#26 0xb5ba2dfb in QSignalMapper::qt_metacall (this=0xb91ed00, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfe1e56c) at .moc/release-shared/moc_qsignalmapper.cpp:81
#27 0xb5b9e1b8 in QMetaObject::activate (sender=0xac90718, from_signal_index=29, to_signal_index=30, argv=0xbfe1e56c) at kernel/qobject.cpp:3113
#28 0xb5b9e5f0 in QMetaObject::activate (sender=0xac90718, m=0xb68c40a4, from_local_signal_index=2, to_local_signal_index=3, argv=0xbfe1e56c) at kernel/qobject.cpp:3207
#29 0xb66daf91 in QAbstractButton::clicked (this=0xac90718, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#30 0xb64023e9 in QAbstractButtonPrivate::emitClicked (this=0xb1329d0) at widgets/qabstractbutton.cpp:543
#31 0xb6404044 in QAbstractButtonPrivate::click (this=0xb1329d0) at widgets/qabstractbutton.cpp:536
#32 0xb64042d6 in QAbstractButton::mouseReleaseEvent (this=0xac90718, e=0xbfe1eb48) at widgets/qabstractbutton.cpp:1115
#33 0xb60a0973 in QWidget::event (this=0xac90718, event=0xbfe1eb48) at kernel/qwidget.cpp:7549
#34 0xb640228e in QAbstractButton::event (this=0xac90718, e=0xbfe1eb48) at widgets/qabstractbutton.cpp:1077
#35 0xb64ad050 in QPushButton::event (this=0xac90718, e=0xbfe1eb48) at widgets/qpushbutton.cpp:662
#36 0xb6049d3c in QApplicationPrivate::notify_helper (this=0x9a7f3a8, receiver=0xac90718, e=0xbfe1eb48) at kernel/qapplication.cpp:4056
#37 0xb60529b1 in QApplication::notify (this=0xbfe204c8, receiver=0xac90718, e=0xbfe1eb48) at kernel/qapplication.cpp:3758
#38 0xb6c435cd in KApplication::notify (this=0xbfe204c8, receiver=0xac90718, event=0xbfe1eb48) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#39 0xb5b88bcb in QCoreApplication::notifyInternal (this=0xbfe204c8, receiver=0xac90718, event=0xbfe1eb48) at kernel/qcoreapplication.cpp:610
#40 0xb6051a1e in QApplicationPrivate::sendMouseEvent (receiver=0xac90718, event=0xbfe1eb48, alienWidget=0xac90718, nativeWidget=0xba14738, buttonDown=0xb68cbaa0, lastMouseReceiver=@0xb68cbaa4)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#41 0xb60c1cce in QETWidget::translateMouseEvent (this=0xba14738, event=0xbfe201dc) at kernel/qapplication_x11.cpp:4409
#42 0xb60c1085 in QApplication::x11ProcessEvent (this=0xbfe204c8, event=0xbfe201dc) at kernel/qapplication_x11.cpp:3428
#43 0xb60ec37a in x11EventSourceDispatch (s=0x9a6fc08, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#44 0xb4c5ab88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#45 0xb4c5e0eb in ?? () from /usr/lib/libglib-2.0.so.0
#46 0xb4c5e268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#47 0xb5bb42f8 in QEventDispatcherGlib::processEvents (this=0x9a50028, flags={i = -1075706984}) at kernel/qeventdispatcher_glib.cpp:327
#48 0xb60eba75 in QGuiEventDispatcherGlib::processEvents (this=0x9a50028, flags={i = -1075706936}) at kernel/qguieventdispatcher_glib.cpp:202
#49 0xb5b871fa in QEventLoop::processEvents (this=0xbfe20440, flags={i = -1075706872}) at kernel/qeventloop.cpp:149
#50 0xb5b87642 in QEventLoop::exec (this=0xbfe20440, flags={i = -1075706808}) at kernel/qeventloop.cpp:201
#51 0xb5b89ae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#52 0xb6049bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#53 0x0804bfef in _start ()

This bug may be a duplicate of or related to bug 200970

Reported using DrKonqi