Application that crashed: kmail
Version of the application: 1.12.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-ARCH x86_64

What I was doing when the application crashed:
When I click a message to read while KMail is starting up, it crashes. I use IMAP.
This also happens when KMail selects a new message for me, without me clicking on one.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  0x00007fa31706efa0 in DwHeaders::FindField(char const*) const () from /usr/lib/libmimelib.so.4
#6  0x00007fa31db04f14 in KMMessage::rawHeaderField (this=<value optimized out>, name=...) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmmessage.cpp:1961
#7  0x00007fa31db07325 in KMMessage::from (this=0x2d50460) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmmessage.cpp:1712
#8  0x00007fa31dd5769f in KMail::FancyHeaderStyle::format (this=<value optimized out>, message=<value optimized out>, strategy=<value optimized out>, vCardName=<value optimized out>, 
    printing=<value optimized out>, topLevel=true) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/headerstyle.cpp:457
#9  0x00007fa31dbf7767 in KMReaderWin::writeMsgHeader (this=0x2330b90, aMsg=<value optimized out>, hasVCard=false, topLevel=<value optimized out>)
    at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmreaderwin.cpp:1791
#10 0x00007fa31dbff478 in KMReaderWin::parseMsg (this=0x2330b90, aMsg=0x2d50460) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmreaderwin.cpp:1678
#11 0x00007fa31dbee45a in KMReaderWin::displayMessage (this=0x2330b90) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmreaderwin.cpp:1608
#12 0x00007fa31dbee634 in KMReaderWin::updateReaderWin (this=0x2330b90) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmreaderwin.cpp:1548
#13 0x00007fa31dbfbc7d in KMReaderWin::update (this=0x100000001, observable=0x2d81978) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmreaderwin.cpp:950
#14 0x00007fa31de21259 in KMail::ISubject::notify (this=0x2d50530) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/isubject.cpp:33
#15 0x00007fa31db0c62c in KMMessage::updateBodyPart (this=0x2d50460, partSpecifier=) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/kmmessage.cpp:3237
#16 0x00007fa31ddf54ba in KMail::ImapJob::slotGetMessageResult (this=0x2cbf3b0, job=<value optimized out>) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/imapjob.cpp:435
#17 0x00007fa31ddf993b in KMail::ImapJob::qt_metacall (this=0x2cbf3b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff7fd44120)
    at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/imapjob.moc:82
#18 0x00007fa31d3eb47c in QMetaObject::activate (sender=0x2d6cb40, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6d6f72) at kernel/qobject.cpp:3112
#19 0x00007fa31e4bcb02 in KJob::result(KJob*) () from /usr/lib/libkdecore.so.5
#20 0x00007fa31e4bce7f in KJob::emitResult() () from /usr/lib/libkdecore.so.5
#21 0x00007fa31681ec43 in KIO::SimpleJob::slotFinished() () from /usr/lib/libkio.so.5
#22 0x00007fa31681f103 in KIO::TransferJob::slotFinished() () from /usr/lib/libkio.so.5
#23 0x00007fa31681da11 in KIO::TransferJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#24 0x00007fa31d3eb47c in QMetaObject::activate (sender=0x2a989f0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6d6f72) at kernel/qobject.cpp:3112
#25 0x00007fa3168df871 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/libkio.so.5
#26 0x00007fa3168dc123 in KIO::SlaveInterface::dispatch() () from /usr/lib/libkio.so.5
#27 0x00007fa3168cef4d in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#28 0x00007fa3168d106c in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#29 0x00007fa31d3eb47c in QMetaObject::activate (sender=0x211c150, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6d6f72) at kernel/qobject.cpp:3112
#30 0x00007fa3167ebd97 in KIO::ConnectionPrivate::dequeue() () from /usr/lib/libkio.so.5
#31 0x00007fa3167ebebd in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#32 0x00007fa31d3e5799 in QObject::event (this=0x211c150, e=0x2d866a0) at kernel/qobject.cpp:1110
#33 0x00007fa31c88260c in QApplicationPrivate::notify_helper (this=0x1fcb7d0, receiver=0x211c150, e=0x2d866a0) at kernel/qapplication.cpp:4065
#34 0x00007fa31c8898de in QApplication::notify (this=0x7fff7fd453b0, receiver=0x211c150, e=0x2d866a0) at kernel/qapplication.cpp:4030
#35 0x00007fa31ea78926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#36 0x00007fa31d3d633c in QCoreApplication::notifyInternal (this=0x7fff7fd453b0, receiver=0x211c150, event=0x2d866a0) at kernel/qcoreapplication.cpp:610
#37 0x00007fa31d3d6f4a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1f725e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#38 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1f725e0) at kernel/qcoreapplication.cpp:1247
#39 0x00007fa31d3fecc3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#40 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#41 0x00007fa3143ff1fe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0x00007fa314402bb8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#43 0x00007fa314402ce0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0x00007fa31d3fe863 in QEventDispatcherGlib::processEvents (this=0x1fbfcc0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#45 0x00007fa31c9156de in QGuiEventDispatcherGlib::processEvents (this=0x100000001, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#46 0x00007fa31d3d4c72 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#47 0x00007fa31d3d5044 in QEventLoop::exec (this=0x7fff7fd45200, flags=) at kernel/qeventloop.cpp:201
#48 0x00007fa31d3d71f9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0x0000000000402f89 in main (argc=<value optimized out>, argv=<value optimized out>) at /home/phil/kdemod/core/kdepim/src/kdepim-4.3.4/kmail/main.cpp:146

This bug may be a duplicate of or related to bug 193891

Reported using DrKonqi