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)) "release 142"
Qt Version: 4.5.2
Operating System: Linux 2.6.30-10-default i686
Distribution: "openSUSE 11.2 Milestone 3 (i586)"

What I was doing when the application crashed:
after closing the kontact (kmail was the last application) i get this backtrace 

 -- Backtrace:
Application: Kontact (kontact), signal: Aborted
[KCrash Handler]
#6  0xffffe424 in __kernel_vsyscall ()
#7  0xb6a1d10f in raise () from /lib/libc.so.6
#8  0xb6a1ea27 in abort () from /lib/libc.so.6
#9  0xb76201a4 in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4
#10 0xb76202a8 in qFatal(char const*, ...) () from /usr/lib/libQtCore.so.4
#11 0xb022e587 in operator-> (this=<value optimized out>) at /usr/src/debug/kdepimlibs-4.2.96/akonadi/control.cpp:120
#12 Akonadi::Control::start (this=<value optimized out>) at /usr/src/debug/kdepimlibs-4.2.96/akonadi/control.cpp:202
#13 0xb0372c74 in ?? () from /usr/lib/kde4/kabc_akonadi.so
#14 0xb037806f in ?? () from /usr/lib/kde4/kabc_akonadi.so
#15 0xb035240e in ?? () from /usr/lib/kde4/kabc_akonadi.so
#16 0xb5a88e47 in KRES::Resource::open (this=0x88b1e60) at /usr/src/debug/kdepimlibs-4.2.96/kresources/resource.cpp:122
#17 0xb5a3f480 in KABC::StdAddressBook::Private::init (this=0x833c300, asynchronous=false) at /usr/src/debug/kdepimlibs-4.2.96/kabc/stdaddressbook.cpp:151
#18 0xb5a40f2a in KABC::StdAddressBook::self (asynchronous=false) at /usr/src/debug/kdepimlibs-4.2.96/kabc/stdaddressbook.cpp:92
#19 0xb5a410b4 in KABC::StdAddressBook::self () at /usr/src/debug/kdepimlibs-4.2.96/kabc/stdaddressbook.cpp:81
#20 0xaf490dba in KOPrefs::instance() () from /usr/lib/libkorganizer_core.so.4
#21 0xaf68d397 in ?? () from /usr/lib/libkorganizerprivate.so.4
#22 0xaf68ec20 in ?? () from /usr/lib/libkorganizerprivate.so.4
#23 0xb77362f4 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#24 0xb7737015 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#25 0xb592d635 in KCal::Calendar::calendarChanged (this=0x8830d58) at /usr/src/debug/kdepimlibs-4.2.96/build/kcal/calendar.moc:86
#26 0xb592d6a2 in KCal::Calendar::qt_metacall (this=0x8830d58, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbff3f798) at /usr/src/debug/kdepimlibs-4.2.96/build/kcal/calendar.moc:73
#27 0xb59979a2 in KCal::CalendarResources::qt_metacall (this=0x8830d58, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbff3f798) at /usr/src/debug/kdepimlibs-4.2.96/build/kcal/calendarresources.moc:76
#28 0xb77362f4 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#29 0xb7737015 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#30 0xb5984345 in KCal::ResourceCalendar::resourceChanged (this=0x8861ec0, _t1=0x8861ec0) at /usr/src/debug/kdepimlibs-4.2.96/build/kcal/resourcecalendar.moc:117
#31 0xb015a0c9 in ?? () from /usr/lib/kde4/kcal_akonadi.so
#32 0xb0175bb1 in ?? () from /usr/lib/kde4/kcal_akonadi.so
#33 0xb0154a95 in ?? () from /usr/lib/kde4/kcal_akonadi.so
#34 0xb5a89246 in KRES::Resource::close (this=0x8861ec0) at /usr/src/debug/kdepimlibs-4.2.96/kresources/resource.cpp:141
#35 0xb599ae51 in KCal::CalendarResources::close (this=0x8830d58) at /usr/src/debug/kdepimlibs-4.2.96/kcal/calendarresources.cpp:350
#36 0xb599b1b2 in KCal::CalendarResources::~CalendarResources (this=0x8830d58, __in_chrg=<value optimized out>) at /usr/src/debug/kdepimlibs-4.2.96/kcal/calendarresources.cpp:247
#37 0xb161c013 in KOrg::StdCalendar::~StdCalendar() () from /usr/lib/libkorganizer_calendar.so.4
#38 0xb161dd0f in ?? () from /usr/lib/libkorganizer_calendar.so.4
#39 0xb5f1b9e4 in ?? () from /usr/lib/libkde3support.so.4
#40 0xb7720370 in qt_call_post_routines() () from /usr/lib/libQtCore.so.4
#41 0xb6d6d80a in QApplication::~QApplication() () from /usr/lib/libQtGui.so.4
#42 0xb7c572a8 in KApplication::~KApplication() () from /usr/lib/libkdeui.so.5
#43 0xb7c5e548 in KUniqueApplication::~KUniqueApplication() () from /usr/lib/libkdeui.so.5
#44 0x0804b5d1 in _start ()

Reported using DrKonqi