Version:            (using KDE 4.1.2)
OS:                Linux
Installed from:    Ubuntu Packages

kontact starts automatically through kde session management but crashes immediately with:

[KCrash handler]
#6  0xb0ff7252 in Akregator::FeedList::findByID ()
   from /usr/lib/kde4/akregatorpart.so
#7  0xb101d079 in ?? () from /usr/lib/kde4/akregatorpart.so
#8  0xb101d1ae in ?? () from /usr/lib/kde4/akregatorpart.so
#9  0xb77f3a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb77f47e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb77f9db7 in ?? () from /usr/lib/libQtCore.so.4
#12 0xb77f9edc in ?? () from /usr/lib/libQtCore.so.4
#13 0xb77ee53f in QObject::event () from /usr/lib/libQtCore.so.4
#14 0xb6ecf8ec in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#15 0xb6ed776e in QApplication::notify () from /usr/lib/libQtGui.so.4
#16 0xb7cad72d in KApplication::notify () from /usr/lib/libkdeui.so.5
#17 0xb77dee61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#18 0xb780cd81 in ?? () from /usr/lib/libQtCore.so.4
#19 0xb7809520 in ?? () from /usr/lib/libQtCore.so.4
#20 0xb55fb6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0xb55feda3 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0xb55fef61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0xb7809478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#24 0xb6f69ee5 in ?? () from /usr/lib/libQtGui.so.4
#25 0xb77dd52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#26 0xb77dd6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#27 0xb77dfda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#28 0xb6ecf767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#29 0x0804bf52 in _start ()
#0  0xb7fe3430 in __kernel_vsyscall ()

Both kontact and akregator start fine under other circumstances.