Application: kontact (4.11.1)
KDE Platform Version: 4.11.1
Qt Version: 4.8.5
Operating System: Linux 3.10.10-1.g8038aea-desktop x86_64
Distribution: "openSUSE 12.2 (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed:
Receive an email with a calendar event. Instead of accept, click on counter-proposal. Kontact crashes. 
Did not remember such crash in 4.10.5

KDE 4.11.1 from OpenSUSE KR411 repositories on x86_64

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc1633bf780 (LWP 13320))]

Thread 4 (Thread 0x7fc149008700 (LWP 13321)):
#0  0x00007fc15aac28f4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fc15e1f0a90 in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fc15e1f0ac9 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fc15aabee0e in start_thread () from /lib64/libpthread.so.0
#4  0x00007fc16091c2cd in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fc1086ed700 (LWP 13322)):
#0  0x00007fc15aac28f4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fc15df6d1a7 in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fc15e217f9e in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fc15aabee0e in start_thread () from /lib64/libpthread.so.0
#4  0x00007fc16091c2cd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fc0f3974700 (LWP 13330)):
#0  0x00007fc16091414f in poll () from /lib64/libc.so.6
#1  0x00007fc15a513684 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fc15a5137a4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fc1610904f6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#4  0x00007fc161060b2f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#5  0x00007fc161060db8 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#6  0x00007fc160f63100 in QThread::exec() () from /usr/lib64/libQtCore.so.4
#7  0x00007fc160f660dc in ?? () from /usr/lib64/libQtCore.so.4
#8  0x00007fc15aabee0e in start_thread () from /lib64/libpthread.so.0
#9  0x00007fc16091c2cd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fc1633bf780 (LWP 13320)):
[KCrash Handler]
#5  0x00007fc10716fe68 in Akonadi::ITIPHandler::processiTIPMessage(QString const&, QString const&, QString const&) () from /usr/lib64/libakonadi-calendar.so.4
#6  0x00007fc107172342 in Akonadi::ITIPHandler::Private::onLoadFinished(bool, QString const&) () from /usr/lib64/libakonadi-calendar.so.4
#7  0x00007fc16107737f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#8  0x00007fc10717b0f4 in Akonadi::FetchJobCalendar::loadFinished(bool, QString const&) () from /usr/lib64/libakonadi-calendar.so.4
#9  0x00007fc16107685e in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#10 0x00007fc161a6b91c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#11 0x00007fc161a6fd9a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#12 0x00007fc16277dd76 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#13 0x00007fc161061e7e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#14 0x00007fc1610657e1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#15 0x00007fc161090343 in ?? () from /usr/lib64/libQtCore.so.4
#16 0x00007fc15a5133b5 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#17 0x00007fc15a5136e8 in ?? () from /usr/lib64/libglib-2.0.so.0
#18 0x00007fc15a5137a4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#19 0x00007fc1610904d6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#20 0x00007fc161b0bdde in ?? () from /usr/lib64/libQtGui.so.4
#21 0x00007fc161060b2f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#22 0x00007fc161060db8 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#23 0x00007fc161065af8 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#24 0x0000000000403649 in ?? ()
#25 0x00007fc160859455 in __libc_start_main () from /lib64/libc.so.6
#26 0x0000000000403bb1 in _start ()

Reported using DrKonqi