Application that crashed: akonadi_kcal_resource
Version of the application: 0.1
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
New event (meeting request) received by email (in kontact). Click on "accept" to add it to my calendar and select a remote calendar which is on a Zimbra server. Next is akonadi crashing.
Unfortunately, it happens quite a lot (with different events).

 -- Backtrace:
Application: Akonadi Resource (akonadi_kcal_resource), signal: Segmentation fault
[KCrash Handler]
#6  0xb799f3ec in KCal::IncidenceBase::uid () from /usr/lib/libkcal.so.4
#7  0xb7a25829 in KCal::ResourceCached::clearChange () from /usr/lib/libkcal.so.4
#8  0xb41fe344 in KCal::ResourceRemote::slotSaveJobResult () from /usr/lib/libkcal_resourceremote.so.4
#9  0xb41fe857 in KCal::ResourceRemote::qt_metacall () from /usr/lib/libkcal_resourceremote.so.4
#10 0xb7e65a58 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7e666e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xb7b36cb3 in KJob::result () from /usr/lib/libkdecore.so.5
#13 0xb7b37159 in KJob::emitResult () from /usr/lib/libkdecore.so.5
#14 0xb77bb038 in KIO::FileCopyJob::slotResult () from /usr/lib/libkio.so.5
#15 0xb77b5b9f in KIO::FileCopyJob::qt_metacall () from /usr/lib/libkio.so.5
#16 0xb7e65a58 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#17 0xb7e666e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#18 0xb7b36cb3 in KJob::result () from /usr/lib/libkdecore.so.5
#19 0xb7b37159 in KJob::emitResult () from /usr/lib/libkdecore.so.5
#20 0xb77b65a5 in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.5
#21 0xb77b6ee3 in KIO::TransferJob::slotFinished () from /usr/lib/libkio.so.5
#22 0xb77b348b in KIO::TransferJob::qt_metacall () from /usr/lib/libkio.so.5
#23 0xb7e65a58 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0xb7e666e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#25 0xb787c417 in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.5
#26 0xb7880157 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.5
#27 0xb787c8f7 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.5
#28 0xb786e66d in KIO::Slave::gotInput () from /usr/lib/libkio.so.5
#29 0xb7870b03 in KIO::Slave::qt_metacall () from /usr/lib/libkio.so.5
#30 0xb7e65a58 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#31 0xb7e666e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#32 0xb777b147 in KIO::Connection::readyRead () from /usr/lib/libkio.so.5
#33 0xb777cab3 in ?? () from /usr/lib/libkio.so.5
#34 0xb777ce96 in KIO::Connection::qt_metacall () from /usr/lib/libkio.so.5
#35 0xb7e5e6ab in QMetaCallEvent::placeMetaCall () from /usr/lib/libQtCore.so.4
#36 0xb7e60150 in QObject::event () from /usr/lib/libQtCore.so.4
#37 0xb6868bcc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#38 0xb6870ede in QApplication::notify () from /usr/lib/libQtGui.so.4
#39 0xb732d4dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#40 0xb7e4f7ab in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#41 0xb7e50405 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#42 0xb7e505fd in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#43 0xb7e7b58f in ?? () from /usr/lib/libQtCore.so.4
#44 0xb6355b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#45 0xb63590eb in ?? () from /usr/lib/libglib-2.0.so.0
#46 0xb6359268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#47 0xb7e7b1d8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#48 0xb690a765 in ?? () from /usr/lib/libQtGui.so.4
#49 0xb7e4ddda in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#50 0xb7e4e21a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#51 0xb7e506c9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#52 0xb6868a47 in QApplication::exec () from /usr/lib/libQtGui.so.4
#53 0xb8013363 in Akonadi::ResourceBase::init () from /usr/lib/libakonadi-kde.so.4
#54 0x0804fb1f in _start ()

Reported using DrKonqi