kontact crash on Summary page

Binary package hint: kdepim

SW: 3.5.7enterprise20070907-0ubuntu2

When going to Summary, Kontact crashes.
Note: I have installed Basket (which also integrated in Kontact).

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1243134272 (LWP 11996)]
[New Thread -1286837360 (LWP 12000)]
[New Thread -1278444656 (LWP 11999)]
[New Thread -1270051952 (LWP 11998)]
[New Thread -1261659248 (LWP 11997)]
[KCrash handler]
#6 0xb7b98d20 in QShared::ref (this=0x29) at ../../../include/qshared.h:49
#7 0xb6a2b26b in QString (this=0xbfa85374, s=@0x9479a74)
    at tools/qstring.cpp:1397
#8 0xb7d224be in KCal::Incidence::relatedToUid (this=0x94799e0)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/incidence.cpp:288
#9 0xb7d5c5af in KCal::ICalFormatImpl::populate (this=0x9179e90,
    cal=0x8e0bbc8, calendar=0x91ec698)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/icalformatimpl.cpp:2055
#10 0xb7d53cda in KCal::ICalFormat::fromRawString (this=0xbfa854bc,
    cal=0x8e0bbc8, text=@0xbfa8544c)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/icalformat.cpp:184
#11 0xb7d54340 in KCal::ICalFormat::load (this=0xbfa854bc,
    calendar=0x8e0bbc8, fileName=@0xbfa85520)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/icalformat.cpp:98
#12 0xb7d7dde3 in KCal::FileStorage::load (this=0xbfa85514)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/filestorage.cpp:97
#13 0xb7d45804 in KCal::CalendarLocal::load (this=0x8e0bbc8,
    fileName=@0xbfa85574, format=0x0)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/calendarlocal.cpp:66
#14 0xb7d81722 in KCal::ResourceLocal::doLoad (this=0x8e0bb90)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/resourcelocal.cpp:154
#15 0xb7d80ada in KCal::ResourceCalendar::load (this=0x8e0bb90)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/resourcecalendar.cpp:123
#16 0xb7d8cb2e in KCal::CalendarResources::load (this=0x8e01d68)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./libkcal/calendarresources.cpp:143
#17 0xb5840a97 in SummaryWidget (this=0x91ec840, plugin=0x820cf00,
    parent=0x8db14c8, name=0x0)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/korganizer/summarywidget.cpp:68
#18 0xb583b2e3 in KOrganizerPlugin::createSummaryWidget (this=0x820cf00,
    parent=0x8db14c8)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/korganizer/korganizerplugin.cpp:81
#19 0xb535b7ca in SummaryViewPart::updateWidgets (this=0x8d847b0)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/summary/summaryview_part.cpp:174
#20 0xb535c708 in SummaryViewPart::initGUI (this=0x8d847b0, core=0x80845b0)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/summary/summaryview_part.cpp:390
#21 0xb535cd1b in SummaryViewPart (this=0x8d847b0, core=0x80845b0,
    aboutData=0x8d84658, parent=0x82df350, name=0xb535e867 "summarypart")
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/summary/summaryview_part.cpp:78
#22 0xb53580c1 in SummaryView::createPart (this=0x82df350)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/plugins/summary/summaryview_plugin.cpp:102
#23 0xb7dfc9f2 in Kontact::Plugin::part (this=0x82df350)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/interfaces/plugin.cpp:148
#24 0x08062000 in Kontact::MainWindow::selectPlugin (this=0x80845b0,
    plugin=0x82df350)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/src/mainwindow.cpp:691
#25 0x08061dd2 in Kontact::MainWindow::qt_invoke (this=0x80845b0, _id=78,
    _o=0xbfa85b64) at ./mainwindow.moc:151
#26 0xb6713893 in QObject::activate_signal (this=0x8117710, clist=0x812dae0,
    o=0xbfa85b64) at kernel/qobject.cpp:2356
#27 0x08064311 in Kontact::SidePaneBase::pluginSelected (this=0x8117710,
    t0=0x82df350) at ./sidepanebase.moc:114
#28 0x080644f1 in Kontact::SidePaneBase::qt_emit (this=0x8117710, _id=2,
    _o=0xbfa85c34) at ./sidepanebase.moc:133
#29 0x0806478f in Kontact::IconSidePane::qt_emit (this=0x8117710, _id=2,
    _o=0xbfa85c34) at ./iconsidepane.moc:244
#30 0xb6713867 in QObject::activate_signal (this=0x8117bb0, clist=0x812a8f8,
    o=0xbfa85c34) at kernel/qobject.cpp:2354
#31 0x080649f1 in Kontact::Navigator::pluginActivated (this=0x8117bb0,
    t0=0x82df350) at ./iconsidepane.moc:122
#32 0xb6804d51 in QListBox::mousePressEventEx (this=0x8117bb0, e=0xbfa85e8c)
    at widgets/qlistbox.cpp:2047
#33 0xb6805490 in QListBox::mousePressEvent (this=0x8117bb0, e=0xbfa85e8c)
    at widgets/qlistbox.cpp:2019
#34 0xb674a644 in QWidget::event (this=0x8117bb0, e=0xbfa85e8c)
    at kernel/qwidget.cpp:4696
#35 0xb66aaaf0 in QApplication::internalNotify (this=0xbfa866ec,
    receiver=0x8117bb0, e=0xbfa85e8c) at kernel/qapplication.cpp:2635
#36 0xb66accae in QApplication::notify (this=0xbfa866ec, receiver=0x8118470,
    e=0xbfa86110) at kernel/qapplication.cpp:2421
#37 0xb6e71242 in KApplication::notify (this=0xbfa866ec, receiver=0x8118470,
    event=0xbfa86110)
    at /build/buildd/kdelibs-3.5.7/./kdecore/kapplication.cpp:550
#38 0xb663d27d in QApplication::sendSpontaneousEvent (receiver=0x8118470,
    event=0xbfa86110) at kernel/qapplication.h:523
#39 0xb663bee2 in QETWidget::translateMouseEvent (this=0x8118470,
    event=0xbfa86568) at kernel/qapplication_x11.cpp:4304
#40 0xb6639fcc in QApplication::x11ProcessEvent (this=0xbfa866ec,
    event=0xbfa86568) at kernel/qapplication_x11.cpp:3481
#41 0xb66511a4 in QEventLoop::processEvents (this=0x80b8180, flags=4)
    at kernel/qeventloop_x11.cpp:192
#42 0xb66c51ce in QEventLoop::enterLoop (this=0x80b8180)
    at kernel/qeventloop.cpp:198
#43 0xb66c4fde in QEventLoop::exec (this=0x80b8180)
    at kernel/qeventloop.cpp:145
#44 0xb66ac699 in QApplication::exec (this=0xbfa866ec)
    at kernel/qapplication.cpp:2758
#45 0x0805b7b5 in main (argc=1, argv=0xf1)
    at /build/buildd/kdepim-3.5.7enterprise20070907/./kontact/src/main.cpp:163
#46 0xb5ebc050 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#47 0x0805aed1 in _start ()