Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-gentoo-r5 x86_64

What I was doing when the application crashed:
I started kontact and opened an email from drafts. 

It died and I can't find the email anymore - anywhere. 

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  DwEntity::Headers (this=0x41201e00200072) at /var/tmp/portage/kde-base/mimelib-4.3.2/work/mimelib-4.3.2/mimelib/entity.cpp:241
#6  0x00007fafe2cdfa4e in KMMessage::rawHeaderField (this=0x1c6b790, name=@0x7fff7afe7db0) at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmmessage.cpp:1958
#7  0x00007fafe2ce0995 in KMMessage::from (this=0x1c6b790) at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmmessage.cpp:1710
#8  0x00007fafe2e93b4e in KMail::FancyHeaderStyle::format (this=<value optimized out>, message=0x1c6b790, strategy=0xb8b960, vCardName=@0x7fff7aff2890, printing=<value optimized out>, topLevel=true)
    at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/headerstyle.cpp:457
#9  0x00007fafe2d89959 in KMReaderWin::writeMsgHeader (this=0x1759f30, aMsg=0x1c6b790, hasVCard=false, topLevel=false)
    at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmreaderwin.cpp:1783
#10 0x00007fafe2d97497 in KMReaderWin::parseMsg (this=0x1759f30, aMsg=0x1c6b790) at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmreaderwin.cpp:1668
#11 0x00007fafe2d8f0de in KMReaderWin::displayMessage (this=0x1759f30) at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmreaderwin.cpp:1605
#12 0x00007fafe2d8f2da in KMReaderWin::updateReaderWin (this=0x1759f30) at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2/kmail/kmreaderwin.cpp:1545
#13 0x00007fafe2d927bd in KMReaderWin::qt_metacall (this=0x1759f30, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff7aff30a0)
    at /var/tmp/portage/kde-base/kmail-4.3.2/work/kmail-4.3.2_build/kmail/kmreaderwin.moc:168
#14 0x00007faff46b2eb9 in QMetaObject::activate (sender=0x1759fd8, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x6d6f72) at kernel/qobject.cpp:3101
#15 0x00007faff46ad7b3 in QObject::event (this=0x1759fd8, e=0x1c6b790) at kernel/qobject.cpp:1066
#16 0x00007faff54426dd in QApplicationPrivate::notify_helper (this=0x64a530, receiver=0x1759fd8, e=0x7fff7aff3770) at kernel/qapplication.cpp:4065
#17 0x00007faff544b00e in QApplication::notify (this=0x7fff7aff3ab0, receiver=0x1759fd8, e=0x7fff7aff3770) at kernel/qapplication.cpp:4030
#18 0x00007faff6212341 in KApplication::notify (this=0x7fff7aff3ab0, receiver=0x1759fd8, event=0x7fff7aff3770)
    at /var/tmp/portage/kde-base/kdelibs-4.3.2-r2/work/kdelibs-4.3.2/kdeui/kernel/kapplication.cpp:302
#19 0x00007faff469dd53 in QCoreApplication::notifyInternal (this=0x7fff7aff3ab0, receiver=0x1759fd8, event=0x7fff7aff3770) at kernel/qcoreapplication.cpp:606
#20 0x00007faff46c7c46 in QTimerInfoList::activateTimers (this=0x63ceb0) at kernel/qcoreapplication.h:213
#21 0x00007faff46c4e7d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#22 0x00007fafefc7df41 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007fafefc814d8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#24 0x00007fafefc8168c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007faff46c4def in QEventDispatcherGlib::processEvents (this=0x634770, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:328
#26 0x00007faff54ce28f in QGuiEventDispatcherGlib::processEvents (this=0x41201e00200072, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#27 0x00007faff469ca12 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 2063546848}) at kernel/qeventloop.cpp:149
#28 0x00007faff469cbac in QEventLoop::exec (this=0x7fff7aff3a20, flags={i = 2063546928}) at kernel/qeventloop.cpp:197
#29 0x00007faff46a1526 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#30 0x000000000040405a in main (argc=1, argv=0x7fff7aff3fc8) at /var/tmp/portage/kde-base/kontact-4.3.2/work/kontact-4.3.2/kontact/src/main.cpp:218

Reported using DrKonqi