Version:            (using Devel)
OS:                Linux
Installed from:    Compiled sources

I added a simple event to my calendar (Kubuntu 8.10, KDE 4.2rc1), backed by a Akonadi compatability resource, and doubled clicked on it afterwards to edit it.

After the double click korgac, kontact and some akonadi resources crashed with about the same backtrace:

Application: KOrganizer Reminder Daemon (korgac), signal SIGABRT
0x00007fb4253e25f0 in __nanosleep_nocancel () from /lib/libc.so.6

Thread 1 (Thread 0x7fb428b366f0 (LWP 7047)):
[KCrash Handler]
#5  0x00007fb42536cfd5 in raise () from /lib/libc.so.6
#6  0x00007fb42536eb43 in abort () from /lib/libc.so.6
#7  0x00007fb425eba6b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007fb425eba7fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007fb418f67577 in CollectionFetchJob (this=0x28225a0, collection=@0x7fff30b7a820, type=Akonadi::CollectionFetchJob::Base, parent=<value optimized out>)
    at /build/buildd/kdepimlibs-4.1.96/akonadi/collectionfetchjob.cpp:72
#10 0x00007fb418f988e6 in Akonadi::ItemCollectionFetchJob::doStart (this=0x262e0e0) at /build/buildd/kdepimlibs-4.1.96/akonadi/monitor_p.cpp:335
#11 0x00007fb418f95e80 in Akonadi::JobPrivate::startQueued (this=<value optimized out>) at /build/buildd/kdepimlibs-4.1.96/akonadi/job.cpp:97
#12 0x00007fb418faa625 in Akonadi::SessionPrivate::startJob (this=0x220ca80, job=0x262e0e0) at /build/buildd/kdepimlibs-4.1.96/akonadi/session.cpp:163
#13 0x00007fb418fad1c8 in Akonadi::SessionPrivate::doStartNext (this=0x220ca80) at /build/buildd/kdepimlibs-4.1.96/akonadi/session.cpp:152
#14 0x00007fb418fad319 in Akonadi::Session::qt_metacall (this=0x21fc420, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff30b7aa00)
    at /build/buildd/kdepimlibs-4.1.96/obj-x86_64-linux-gnu/akonadi/session.moc:77
#15 0x00007fb425fbf134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0x00007fb425fc539f in ?? () from /usr/lib/libQtCore.so.4
#17 0x00007fb425fb9a43 in QObject::event () from /usr/lib/libQtCore.so.4
#18 0x00007fb426b41c3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#19 0x00007fb426b499ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#20 0x00007fb4285673cb in KApplication::notify (this=0x7fff30b7b400, receiver=0x284f290, event=0x7fff30b7b0c0) at /build/buildd/kde4libs-4.1.96/kdeui/kernel/kapplication.cpp:307
#21 0x00007fb425faad61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#22 0x00007fb425fd6ab6 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007fb425fd31fd in ?? () from /usr/lib/libQtCore.so.4
#24 0x00007fb421418d3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007fb42141c50d in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007fb42141c6cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007fb425fd315f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#28 0x00007fb426bd3a6f in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007fb425fa9682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#30 0x00007fb425fa980d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#31 0x00007fb425fabcbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#32 0x000000000040b23c in main (argc=3, argv=0x7fff30b7b6e8) at /build/buildd/kdepim-4.1.96/korganizer/korgac/korgacmain.cpp:90