Application: korgac (0.9)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.31-22-generic x86_64
Distribution: Ubuntu 9.10

-- Information about the crash:
I had problems with Akonadi freezing up the comp. It always took 100% CPU for several seconds when booting the comp, then it just froze every time I booted. 

I removed everything from .kde/share/apps/korganizer and also from akondai folder, booted into an empty calendar without problems. When I tried to import my old calendar from backup it crashed. 

 -- Backtrace:
Application: KOrganizer Reminder Daemon (korgac), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f67e61c5554 in KCal::Incidence::removeRelation(KCal::Incidence*) () from /usr/lib/libkcal.so.4
#6  0x00007f67e61c5716 in KCal::Incidence::setRelatedTo(KCal::Incidence*) () from /usr/lib/libkcal.so.4
#7  0x00007f67e61e95a4 in KCal::Calendar::setupRelations(KCal::Incidence*) () from /usr/lib/libkcal.so.4
#8  0x00007f67e61ef4a0 in KCal::CalendarLocal::addTodo(KCal::Todo*) () from /usr/lib/libkcal.so.4
#9  0x00007f67e620c643 in ?? () from /usr/lib/libkcal.so.4
#10 0x00007f67e61fecf2 in KCal::ICalFormat::fromRawString(KCal::Calendar*, QByteArray const&) () from /usr/lib/libkcal.so.4
#11 0x00007f67e61fe350 in KCal::ICalFormat::load(KCal::Calendar*, QString const&) () from /usr/lib/libkcal.so.4
#12 0x00007f67e62368df in KCal::FileStorage::load() () from /usr/lib/libkcal.so.4
#13 0x00007f67e61ee1e3 in KCal::CalendarLocal::load(QString const&, KCal::CalFormat*) () from /usr/lib/libkcal.so.4
#14 0x00007f67e623a56c in KCal::ResourceLocal::doReload() () from /usr/lib/libkcal.so.4
#15 0x00007f67e6239a2d in KCal::ResourceLocal::reload() () from /usr/lib/libkcal.so.4
#16 0x00007f67e6239b30 in KCal::ResourceLocal::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkcal.so.4
#17 0x00007f67e4435c0f in QMetaObject::activate (sender=0x25e07b8, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x25c97bc) at kernel/qobject.cpp:3293
#18 0x00007f67e1ba95f5 in KDirWatch::created (this=0x21, _t1=<value optimized out>) at ./kdirwatch.moc:106
#19 0x00007f67e1ba9dd0 in KDirWatch::setCreated (this=0x25e07b8, _file=...) at ../../kio/kio/kdirwatch.cpp:1786
#20 0x00007f67e1ba9f21 in KDirWatch::qt_metacall (this=0x25e07b8, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x24fb4d0) at ./kdirwatch.moc:85
#21 0x00007f67e4432b49 in QObject::event (this=0x25e07b8, e=0x25ed110) at kernel/qobject.cpp:1248
#22 0x00007f67e501412c in QApplicationPrivate::notify_helper (this=0x22dac60, receiver=0x25e07b8, e=0x25ed110) at kernel/qapplication.cpp:4300
#23 0x00007f67e501a71b in QApplication::notify (this=0x7fffe0566a30, receiver=0x25e07b8, e=0x25ed110) at kernel/qapplication.cpp:4183
#24 0x00007f67e6920076 in KApplication::notify (this=0x7fffe0566a30, receiver=0x25e07b8, event=0x25ed110) at ../../kdeui/kernel/kapplication.cpp:302
#25 0x00007f67e4422e0c in QCoreApplication::notifyInternal (this=0x7fffe0566a30, receiver=0x25e07b8, event=0x25ed110) at kernel/qcoreapplication.cpp:704
#26 0x00007f67e4425587 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x22b3680) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x22b3680) at kernel/qcoreapplication.cpp:1345
#28 0x00007f67e444c7f3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#29 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#30 0x00007f67dfd31bce in g_main_dispatch (context=0x22dd520) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#31 IA__g_main_context_dispatch (context=0x22dd520) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#32 0x00007f67dfd35598 in g_main_context_iterate (context=0x22dd520, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#33 0x00007f67dfd356c0 in IA__g_main_context_iteration (context=0x22dd520, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#34 0x00007f67e444c333 in QEventDispatcherGlib::processEvents (this=0x22b2dd0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#35 0x00007f67e50c3f0e in QGuiEventDispatcherGlib::processEvents (this=0x21, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007f67e4421732 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#37 0x00007f67e4421b0c in QEventLoop::exec (this=0x7fffe0566980, flags=) at kernel/qeventloop.cpp:201
#38 0x00007f67e442584b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#39 0x000000000040cc0f in _start ()

Reported using DrKonqi