Application that crashed: kontact
Version of the application: 4.3.0 rc2
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Opening the overview screen causes Kontact to crash somewhere in kcal_akonadi backend. Calendar entries where converted from standard file ressource to Akonadi automatically on update to 4.3 RC2

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f9d02443dab in KCal::CalendarLocal::close (this=0x36c7530) at /usr/include/qt4/QtCore/qalgorithms.h:350
#6  0x00007f9cd68ecb14 in KCal::ResourceAkonadi::Private::clearResource (this=0x36c7470) at /build/buildd/kdepim-runtime-4.2.96/kresources/kcal/resourceakonadi_p.cpp:118
#7  0x00007f9cd6906442 in ResourcePrivateBase::clear (this=0x36c7470) at /build/buildd/kdepim-runtime-4.2.96/kresources/shared/resourceprivatebase.cpp:264
#8  0x00007f9cd68ea64c in KCal::ResourceAkonadi::doLoad (this=0x34f9280, syncCache=false) at /build/buildd/kdepim-runtime-4.2.96/kresources/kcal/resourceakonadi.cpp:399
#9  0x00007f9d02488ee8 in KCal::ResourceCalendar::load (this=0x34f9280) at /build/buildd/kdepimlibs-4.2.96/kcal/resourcecalendar.cpp:168
#10 0x00007f9d0249a7a3 in KCal::CalendarResources::load (this=0x18808a0) at /build/buildd/kdepimlibs-4.2.96/kcal/calendarresources.cpp:291
#11 0x00007f9cecb47286 in SDSummaryWidget (this=0x4b13d20, plugin=<value optimized out>, parent=<value optimized out>)
    at /build/buildd/kdepim-4.2.96/kontact/plugins/specialdates/sdsummarywidget.cpp:124
#12 0x00007f9cecb41e14 in SpecialdatesPlugin::createSummaryWidget (this=0xa12120, parentWidget=0x47e9a80) at /build/buildd/kdepim-4.2.96/kontact/plugins/specialdates/specialdates_plugin.cpp:50
#13 0x00007f9cec4f4ebf in SummaryViewPart::updateWidgets (this=0x717a420) at /build/buildd/kdepim-4.2.96/kontact/plugins/summary/summaryview_part.cpp:164
#14 0x00007f9cec4f5c0a in SummaryViewPart::initGUI (this=0x717a420, core=<value optimized out>) at /build/buildd/kdepim-4.2.96/kontact/plugins/summary/summaryview_part.cpp:490
#15 0x00007f9cec4f6201 in SummaryViewPart (this=0x717a420, core=<value optimized out>, aboutData=0x2b06a00, parent=<value optimized out>)
    at /build/buildd/kdepim-4.2.96/kontact/plugins/summary/summaryview_part.cpp:74
#16 0x00007f9cec4f2b85 in SummaryView::createPart (this=0xa37110) at /build/buildd/kdepim-4.2.96/kontact/plugins/summary/summaryview_plugin.cpp:114
#17 0x00007f9d032239a9 in Kontact::Plugin::part (this=0x3413920) at /build/buildd/kdepim-4.2.96/kontactinterfaces/plugin.cpp:187
#18 0x00007f9d034478a6 in Kontact::MainWindow::selectPlugin (this=0xa80090, plugin=0xa37110) at /build/buildd/kdepim-4.2.96/kontact/src/mainwindow.cpp:754
#19 0x00007f9d0344c572 in Kontact::MainWindow::qt_metacall (this=0xa80090, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff0c4c47a0)
    at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/mainwindow.moc:107
#20 0x00007f9cfe9a11f2 in QMetaObject::activate (sender=0xa80d30, from_signal_index=<value optimized out>, to_signal_index=27, argv=0x7f9cfec81300) at kernel/qobject.cpp:3069
#21 0x00007f9d0344da4f in Kontact::SidePaneBase::pluginSelected (this=0x3413920, _t1=0xa37110) at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/sidepanebase.moc:84
#22 0x00007f9d0344dadf in Kontact::SidePaneBase::qt_metacall (this=0xa80d30, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff0c4c48f0)
    at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/sidepanebase.moc:71
#23 0x00007f9d0344dcae in Kontact::IconSidePane::qt_metacall (this=0x3413920, _c=4259669288, _id=0, _a=0x7f9cfec81300)
    at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:133
#24 0x00007f9cfe9a11f2 in QMetaObject::activate (sender=0xa99790, from_signal_index=<value optimized out>, to_signal_index=70, argv=0x7f9cfec81300) at kernel/qobject.cpp:3069
#25 0x00007f9d0344dd5f in Kontact::Navigator::pluginActivated (this=0x3413920, _t1=0xa37110) at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:90
#26 0x00007f9d0344e525 in Kontact::Navigator::qt_metacall (this=0xa99790, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff0c4c4a10)
    at /build/buildd/kdepim-4.2.96/obj-x86_64-linux-gnu/kontact/src/iconsidepane.moc:76
#27 0x00007f9cfe9a11f2 in QMetaObject::activate (sender=0x9351f0, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x7f9cfec81300) at kernel/qobject.cpp:3069
#28 0x00007f9cffaaa28a in QItemSelectionModel::currentChanged (this=0x3413920, _t1=<value optimized out>, _t2=<value optimized out>) at .moc/release-shared/moc_qitemselectionmodel.cpp:153
#29 0x00007f9cffaaa3d4 in QItemSelectionModel::setCurrentIndex (this=0x9351f0, index=<value optimized out>, command={i = 206326832}) at itemviews/qitemselectionmodel.cpp:1123
#30 0x00007f9cffa5f425 in QAbstractItemView::mousePressEvent (this=0xa99790, event=<value optimized out>) at itemviews/qabstractitemview.cpp:1508
#31 0x00007f9cff595aa6 in QWidget::event (this=0xa99790, event=0x7fff0c4c57c0) at kernel/qwidget.cpp:7512
#32 0x00007f9cff92f40b in QFrame::event (this=0xa99790, e=0x7fff0c4c57c0) at widgets/qframe.cpp:559
#33 0x00007f9cffa642bd in QAbstractItemView::viewportEvent (this=0xa99790, event=0x7fff0c4c57c0) at itemviews/qabstractitemview.cpp:1466
#34 0x00007f9cfe98aa68 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0xa9a060, event=0x7fff0c4c57c0) at kernel/qcoreapplication.cpp:718
#35 0x00007f9cff54475c in QApplicationPrivate::notify_helper (this=0x92f170, receiver=0xa9a060, e=0x7fff0c4c57c0) at kernel/qapplication.cpp:4080
#36 0x00007f9cff54d0da in QApplication::notify (this=<value optimized out>, receiver=0xa9a060, e=0x7fff0c4c57c0) at kernel/qapplication.cpp:3786
#37 0x00007f9d0097c63b in KApplication::notify (this=0x7fff0c4c66d0, receiver=0xa9a060, event=0x7fff0c4c57c0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#38 0x00007f9cfe98b75c in QCoreApplication::notifyInternal (this=0x7fff0c4c66d0, receiver=0xa9a060, event=0x7fff0c4c57c0) at kernel/qcoreapplication.cpp:602
#39 0x00007f9cff54c328 in QApplicationPrivate::sendMouseEvent (receiver=0xa9a060, event=0x7fff0c4c57c0, alienWidget=0xa9a060, nativeWidget=0xa80d30, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f9cfffa8eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#40 0x00007f9cff5b5e19 in QETWidget::translateMouseEvent (this=0xa80d30, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425
#41 0x00007f9cff5b4a88 in QApplication::x11ProcessEvent (this=0x7fff0c4c66d0, event=0x7fff0c4c6300) at kernel/qapplication_x11.cpp:3543
#42 0x00007f9cff5dd464 in x11EventSourceDispatch (s=0x93b750, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#43 0x00007f9cf80c120a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#44 0x00007f9cf80c48e0 in ?? () from /usr/lib/libglib-2.0.so.0
#45 0x00007f9cf80c4a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#46 0x00007f9cfe9b4e6f in QEventDispatcherGlib::processEvents (this=0x9060a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#47 0x00007f9cff5dcbef in QGuiEventDispatcherGlib::processEvents (this=0x3413920, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#48 0x00007f9cfe98a002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 206333424}) at kernel/qeventloop.cpp:149
#49 0x00007f9cfe98a3cd in QEventLoop::exec (this=0x7fff0c4c6630, flags={i = 206333504}) at kernel/qeventloop.cpp:200
#50 0x00007f9cfe98c694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#51 0x0000000000404945 in main (argc=3, argv=0x7fff0c4c6db8) at /build/buildd/kdepim-4.2.96/kontact/src/main.cpp:218

Reported using DrKonqi