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 i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I was not performing any special actions (no editing) when kontact crashed on me.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb72f34fb in KCal::CalendarLocal::close (this=0x9bb447c) at /usr/include/qt4/QtCore/qalgorithms.h:350
#7  0xb0e98f91 in KCal::ResourceAkonadi::Private::clearResource (this=0x9bb4418) at /build/buildd/kdepim-runtime-4.2.96/kresources/kcal/resourceakonadi_p.cpp:118
#8  0xb0eb46df in ResourcePrivateBase::clear (this=0x9bb4418) at /build/buildd/kdepim-runtime-4.2.96/kresources/shared/resourceprivatebase.cpp:264
#9  0xb0e93a05 in KCal::ResourceAkonadi::doClose (this=0x9bb4070) at /build/buildd/kdepim-runtime-4.2.96/kresources/kcal/resourceakonadi.cpp:425
#10 0xb71e6f97 in KRES::Resource::close (this=0x9bb4070) at /build/buildd/kdepimlibs-4.2.96/kresources/resource.cpp:141
#11 0xb7352dbd in KCal::CalendarResources::close (this=0x9b57870) at /build/buildd/kdepimlibs-4.2.96/kcal/calendarresources.cpp:350
#12 0xb7353145 in ~CalendarResources (this=0x9b57870) at /build/buildd/kdepimlibs-4.2.96/kcal/calendarresources.cpp:247
#13 0xb18880c4 in ~StdCalendar (this=0x9b57870) at /build/buildd/kdepim-4.2.96/korganizer/stdcalendar.cpp:112
#14 0xb1889adf in K3StaticDeleter<KOrg::StdCalendar>::destructObject (this=0xb188c0d4) at /usr/include/k3staticdeleter.h:174
#15 0xb78c487a in K3StaticDeleterPrivate::deleteStaticDeleters () at /build/buildd/kde4libs-4.2.96/kde3support/kdecore/k3staticdeleter.cpp:56
#16 0xb5bdefab in qt_call_post_routines () at kernel/qcoreapplication.cpp:163
#17 0xb60ca738 in ~QApplication (this=0xbfeceda8) at kernel/qapplication.cpp:985
#18 0xb6ce70be in ~KApplication (this=0xbfeceda8) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:904
#19 0xb6cedeb8 in ~KUniqueApplication (this=0xbfeceda8) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kuniqueapplication.cpp:371
#20 0x0804c072 in main (argc=1, argv=0xbfecf0a4) at /build/buildd/kdepim-4.2.96/kontact/src/main.cpp:67

Reported using DrKonqi