Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
When clicking on Feeds in the left sidebar, Kontact crashes. It worked fine in KDE 4.2, 4.3 RC and 4.3.0

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  c4_Differ::BaseOfDiff (this=0x0, id_=95509375) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/include/mk4.inl:849
#7  0xb242e83f in c4_Column::SetupSegments (this=0xa3e3b64) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/column.cpp:219
#8  0xb242efa8 in c4_ColIter::Next (this=0xbffd5938) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/column.inl:57
#9  0xb242f029 in c4_Column::FetchBytes (this=0xa3e3b64, pos_=0, len_=32, buffer_=@0xbffd599c, forceCopy_=true) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/column.cpp:715
#10 0xb2439d52 in c4_FormatB::Define (this=0xa3e3af0, ptr_=0xbffd5a78) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/format.cpp:400
#11 0xb243c51a in c4_HandlerSeq::Prepare (this=0xa3ad308, ptr_=0xbffd5a78, selfDesc_=true) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/handler.cpp:321
#12 0xb2440261 in c4_Persist::LoadAll (this=0xa55de30) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/persist.cpp:1026
#13 0xb244524d in c4_Storage (this=0xa2b24f0, fname_=0xa3adfc0 "/home/heimen-at-kubuntu/.kde/share/apps/akregator/Archive/archiveindex.mk4", mode_=1)
    at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/metakit/src/store.cpp:202
#14 0xb2452bb6 in Akregator::Backend::StorageMK4Impl::open (this=0x9c34d80, autoCommit=true) at /build/buildd/kdepim-4.3.1/akregator/plugins/mk4storage/storagemk4impl.cpp:134
#15 0xb2543abc in Part (this=0xa3ce260, parentWidget=0x997df98, parent=0x997df98) at /build/buildd/kdepim-4.3.1/akregator/src/akregator_part.cpp:206
#16 0xb2544d85 in KPluginFactory::createPartInstance<Akregator::Part> (parentWidget=0x997df98, parent=0x997df98, args=@0xbffd5dd0) at /usr/include/kpluginfactory.h:467
#17 0x41ec0bcf in KPluginFactory::create (this=<value optimized out>, iface=<value optimized out>, parentWidget=<value optimized out>, parent=<value optimized out>, args=<value optimized out>, 
    keyword=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kdecore/util/kpluginfactory.cpp:191
#18 0x410dec7b in Kontact::Core::createPart (this=<value optimized out>, libname=<value optimized out>) at /usr/include/kpluginfactory.h:491
#19 0x410dfe47 in Kontact::Plugin::loadPart (this=) at /build/buildd/kdepim-4.3.1/kontactinterfaces/plugin.cpp:148
#20 0xb4cbb14f in AkregatorPlugin::createPart (this=0x9cd26e8) at /build/buildd/kdepim-4.3.1/kontact/plugins/akregator/akregator_plugin.cpp:97
#21 0x410dfda2 in Kontact::Plugin::part (this=<value optimized out>) at /build/buildd/kdepim-4.3.1/kontactinterfaces/plugin.cpp:187
#22 0x414e10d8 in Kontact::MainWindow::selectPlugin (this=<value optimized out>, plugin=<value optimized out>) at /build/buildd/kdepim-4.3.1/kontact/src/mainwindow.cpp:754
#23 0x414e6264 in Kontact::MainWindow::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>)
    at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/mainwindow.moc:107
#24 0x418a77f8 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3113
#25 0x418a8482 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3187
#26 0x414e79b3 in Kontact::SidePaneBase::pluginSelected (this=) at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/sidepanebase.moc:84
#27 0x414e7a4f in Kontact::SidePaneBase::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>)
    at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/sidepanebase.moc:71
#28 0x414e7cfa in Kontact::IconSidePane::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>)
    at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/iconsidepane.moc:133
#29 0x418a77f8 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3113
#30 0x418a8482 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3187
#31 0x414e7de3 in Kontact::Navigator::pluginActivated (this=) at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/iconsidepane.moc:90
#32 0x414e878d in Kontact::Navigator::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>)
    at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kontact/src/iconsidepane.moc:76
#33 0x418a77f8 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3113
#34 0x418a8482 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3187
#35 0x4485cb29 in QItemSelectionModel::currentChanged (this=) at .moc/release-shared/moc_qitemselectionmodel.cpp:153
#36 0x4485cccd in QItemSelectionModel::setCurrentIndex (this=<value optimized out>, index=<value optimized out>, command=<value optimized out>) at itemviews/qitemselectionmodel.cpp:1123
#37 0x4480e4c6 in QAbstractItemView::mousePressEvent (this=<value optimized out>, event=<value optimized out>) at itemviews/qabstractitemview.cpp:1514
#38 0x4430ed16 in QWidget::event (this=<value optimized out>, event=<value optimized out>) at kernel/qwidget.cpp:7545
#39 0x446bfef3 in QFrame::event (this=<value optimized out>, e=<value optimized out>) at widgets/qframe.cpp:559
#40 0x4476008f in QAbstractScrollArea::viewportEvent (this=) at widgets/qabstractscrollarea.cpp:962
#41 0x44812927 in QAbstractItemView::viewportEvent (this=<value optimized out>, event=<value optimized out>) at itemviews/qabstractitemview.cpp:1476
#42 0x44762695 in QAbstractScrollAreaFilter::eventFilter (this=<value optimized out>, o=<value optimized out>, e=) at widgets/qabstractscrollarea_p.h:100
#43 0x4189141a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:726
#44 0x442b7f8a in QApplicationPrivate::notify_helper (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:4052
#45 0x442c0c21 in QApplication::notify (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:3758
#46 0x4367a2bd in KApplication::notify (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#47 0x418921fb in QCoreApplication::notifyInternal (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:610
#48 0x442bfc8e in QApplicationPrivate::sendMouseEvent (receiver=<value optimized out>, event=<value optimized out>, alienWidget=<value optimized out>, nativeWidget=<value optimized out>, 
    buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#49 0x4432ff6e in QETWidget::translateMouseEvent (this=<value optimized out>, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#50 0x4432f325 in QApplication::x11ProcessEvent (this=<value optimized out>, event=<value optimized out>) at kernel/qapplication_x11.cpp:3428
#51 0x4435a64a in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#52 0x4fc4cb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#53 0x4fc500eb in ?? () from /usr/lib/libglib-2.0.so.0
#54 0x4fc50268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#55 0x418bd938 in QEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#56 0x44359d45 in QGuiEventDispatcherGlib::processEvents (this=) at kernel/qguieventdispatcher_glib.cpp:202
#57 0x4189082a in QEventLoop::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:149
#58 0x41890c72 in QEventLoop::exec (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:201
#59 0x41893119 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#60 0x442b7e27 in QApplication::exec () at kernel/qapplication.cpp:3525
#61 0x0804bfef in main (argc=1, argv=0xbffd8924) at /build/buildd/kdepim-4.3.1/kontact/src/main.cpp:218

Reported using DrKonqi