Application that crashed: kontact
Version of the application: 4.3.0 rc1
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.2
Operating System: Linux 2.6.30-ARCH x86_64

What I was doing when the application crashed:
I start kontact, and if i select kmail when i click to read an email the most common thing to happen is a total kontact crash resulting to this report. An other thing that happens is that all mail appear as black.
The kontact crash also happens when i choose korganizer. Sometimes there is a message about akonadi failing, and other times i also have this total crash.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f9a937abf90 in DwHeaders::FindField () from /usr/lib/libmimelib.so.4
#6  0x00007f9a94b377e4 in KMMessage::rawHeaderField () from /usr/lib/libkmailprivate.so.4
#7  0x00007f9a94b3a075 in KMMessage::from () from /usr/lib/libkmailprivate.so.4
#8  0x00007f9a94d86a7f in KMail::FancyHeaderStyle::format () from /usr/lib/libkmailprivate.so.4
#9  0x00007f9a94c29d54 in KMReaderWin::writeMsgHeader () from /usr/lib/libkmailprivate.so.4
#10 0x00007f9a94c30358 in KMReaderWin::parseMsg () from /usr/lib/libkmailprivate.so.4
#11 0x00007f9a94c1fb7a in KMReaderWin::displayMessage () from /usr/lib/libkmailprivate.so.4
#12 0x00007f9a94c1fd54 in KMReaderWin::updateReaderWin () from /usr/lib/libkmailprivate.so.4
#13 0x00007f9a94c2b97d in KMReaderWin::qt_metacall () from /usr/lib/libkmailprivate.so.4
#14 0x00007f9aa9f01a8c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0x00007f9aa9efba43 in QObject::event () from /usr/lib/libQtCore.so.4
#16 0x00007f9aa93bbe9c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#17 0x00007f9aa93c316e in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0x00007f9aaa884ce6 in KApplication::notify () from /usr/lib/libkdeui.so.5
#19 0x00007f9aa9eec9bc in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#20 0x00007f9aa9f18012 in ?? () from /usr/lib/libQtCore.so.4
#21 0x00007f9aa9f14f7d in ?? () from /usr/lib/libQtCore.so.4
#22 0x00007f9aa2d2ddbe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007f9aa2d31568 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#24 0x00007f9aa2d31690 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007f9aa9f14ec6 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#26 0x00007f9aa944edce in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007f9aa9eeb2c2 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#28 0x00007f9aa9eeb694 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#29 0x00007f9aa9eed849 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#30 0x0000000000403ef7 in _start ()

Reported using DrKonqi