Application that crashed: kontact
Version of the application: 4.3.5
KDE Version: 4.3.5 (KDE 4.3.5) "release 0"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-0.2-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
Every time I boot, Kontact crashes. Afterwards I try to start it manually. Most of the cases I succeed.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f7eaabcb750 (LWP 3536))]

Thread 2 (Thread 0x7f7e8ea9e910 (LWP 3594)):
#0  0x00007f7ea47772cd in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7ea94164a2 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x00007f7ea940c5e2 in ?? () from /usr/lib64/libQtCore.so.4
#3  0x00007f7ea9415485 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007f7ea477265d in start_thread () from /lib64/libpthread.so.0
#5  0x00007f7ea828fe1d in clone () from /lib64/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7eaabcb750 (LWP 3536)):
[KCrash Handler]
#5  0x00007f7e8eaeafff in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#6  0x00007f7e8eaecf8e in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#7  0x00007f7e8eaeaa2a in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#8  0x00007f7e8eaeae16 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#9  0x00007f7e8eaecad6 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#10 0x00007f7e8eaf9092 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#11 0x00007f7e8eafa2f4 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#12 0x00007f7e8eaf4440 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#13 0x00007f7e8eaf4e59 in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#14 0x00007f7e8eaff72c in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#15 0x00007f7e8eb0219d in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#16 0x00007f7e8eb0276d in QString::free(QString::Data*) () from /usr/lib64/kde4/akregator_mk4storage_plugin.so
#17 0x00007f7e8f4210ac in Akregator::Feed::loadArticles() () from /usr/lib64/kde4/akregatorpart.so
#18 0x00007f7e8f424bf4 in Akregator::Feed::fromOPML(QDomElement, Akregator::Backend::Storage*) () from /usr/lib64/kde4/akregatorpart.so
#19 0x00007f7e8f42f7bf in Akregator::FeedList::parseChildNodes(QDomNode&, Akregator::Folder*) () from /usr/lib64/kde4/akregatorpart.so
#20 0x00007f7e8f42f9f6 in Akregator::FeedList::parseChildNodes(QDomNode&, Akregator::Folder*) () from /usr/lib64/kde4/akregatorpart.so
#21 0x00007f7e8f431116 in Akregator::FeedList::readFromOpml(QDomDocument const&) () from /usr/lib64/kde4/akregatorpart.so
#22 0x00007f7e8f46f81b in ?? () from /usr/lib64/kde4/akregatorpart.so
#23 0x00007f7e8f4702a3 in ?? () from /usr/lib64/kde4/akregatorpart.so
#24 0x00007f7e8f470672 in ?? () from /usr/lib64/kde4/akregatorpart.so
#25 0x00007f7ea950ffbc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#26 0x00007f7ea9514fff in ?? () from /usr/lib64/libQtCore.so.4
#27 0x00007f7ea9509f63 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#28 0x00007f7ea89c62ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#29 0x00007f7ea89cd57e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#30 0x00007f7ea9e79016 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#31 0x00007f7ea94faddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#32 0x00007f7ea952671d in ?? () from /usr/lib64/libQtCore.so.4
#33 0x00007f7ea9523654 in ?? () from /usr/lib64/libQtCore.so.4
#34 0x00007f7ea20f8dee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#35 0x00007f7ea20fc7b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#36 0x00007f7ea20fc8e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#37 0x00007f7ea95233a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#38 0x00007f7ea8a5931e in ?? () from /usr/lib64/libQtGui.so.4
#39 0x00007f7ea94f9712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#40 0x00007f7ea94f9ae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#41 0x00007f7ea94fbc99 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#42 0x0000000000403f67 in _start ()

Reported using DrKonqi