Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I received a generated email containing only a pdf document.  I have narrowed the email to the following lines:
--- Start of email ---
From Anystring
Date: Fri, 13 Nov 2009 08:48:31 +0100
From: "From Anyone" <*@anywhere.com>
To: "To Anyone" <*@anywhere.com>
MIME-Version: 1.0
Content-Type: application/octet-stream

--- end of email ---
I beleve it to be the "application/octet-stream" that causes the crash.  Changing the "octet-stream" to "pdf" removes the crash.

Original masked headings (I guess the X-KMail* headings have been added by KMail):
From noreply@personec.com Fri Nov 13 08:48:31 2009
X-MimeOLE: Produced By Microsoft Exchange V6.5
MIME-Version: 1.0
Content-Type: application/octet-stream;
  name="7520091119493.PDF"
Content-Transfer-Encoding: base64
Content-Description: 7520091119493.PDF
Content-Disposition: attachment;
	filename="7520091119493.PDF"
Content-class: urn:content-classes:message
Subject: =?utf-8?B?TMO4bm5zbGlwcGVuIHRpbCBQZXIgT2xhdiBLcm9rYSA6?=
	=?utf-8?B?IE5vdmVtYmVyIGzDuG5uIDIwMDk=?=
Date: Fri, 13 Nov 2009 08:48:31 +0100
Message-ID: <ASPXCH1Usq6iJVRrwEh000003f3@xxx.yyy.zzz>
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: 
Thread-Topic: =?utf-8?B?TMO4bm5zbGlwcGVuIHRpbCBQZXIgT2xhdiBLcm9rYSA6?=
	=?utf-8?B?IE5vdmVtYmVyIGzDuG5uIDIwMDk=?=
Thread-Index: AcpkNc/3hOByMTe3St+l4wLl0rUgcA==
From: "Personec BSP" <noreply@aaa.bbb>
To: "me" <me@x.y.z>
X-UID: 
Status: R
X-Status: NT
X-KMail-EncryptionState:  
X-KMail-SignatureState:  
X-KMail-MDN-Sent:  
--- end of original headings ---



 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  KMail::HiddenAttachmentStrategy::defaultDisplay (this=0x1624a10, node=0x1d76010) at ../../kmail/attachmentstrategy.cpp:151
#6  0x00007fcee4abecbe in KMail::ObjectTreeParser::parseObjectTree (this=0x7fff6c6cca80, node=0x1d76010) at ../../kmail/objecttreeparser.cpp:270
#7  0x00007fcee4944c69 in KMReaderWin::parseMsg (this=0x13218f0, aMsg=0x133eeb0) at ../../kmail/kmreaderwin.cpp:1672
#8  0x00007fcee4933eda in KMReaderWin::displayMessage (this=0x13218f0) at ../../kmail/kmreaderwin.cpp:1605
#9  0x00007fcee49340b4 in KMReaderWin::updateReaderWin (this=0x13218f0) at ../../kmail/kmreaderwin.cpp:1545
#10 0x00007fcee493efac in KMReaderWin::setMsg (this=0x13218f0, aMsg=0x133eeb0, force=true) at ../../kmail/kmreaderwin.cpp:1347
#11 0x00007fcee4af88a4 in KMReaderMainWin::showMsg (this=0x1133ca0, encoding=<value optimized out>, msg=0x133eeb0, serNumOfOriginalMessage=0, nodeIdOffset=-1) at ../../kmail/kmreadermainwin.cpp:131
#12 0x00007fcee4aedcaa in KMOpenMsgCommand::slotResult (this=0x10662e0, job=<value optimized out>) at ../../kmail/kmcommands.cpp:1076
#13 0x00007fcee4aee018 in KMOpenMsgCommand::qt_metacall (this=0x10662e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6c6cd430) at ./kmcommands.moc:746
#14 0x00007fcee357addc in QMetaObject::activate (sender=0x134bec0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1dc7301) at kernel/qobject.cpp:3113
#15 0x00007fcee5203af2 in KJob::result (this=0x1624a10, _t1=0x134bec0) at ./kjob.moc:188
#16 0x00007fcee5203e6f in KJob::emitResult (this=0x134bec0) at ../../kdecore/jobs/kjob.cpp:304
#17 0x00007fcedd323d93 in KIO::SimpleJob::slotFinished (this=0x134bec0) at ../../kio/kio/job.cpp:477
#18 0x00007fcedd324253 in KIO::TransferJob::slotFinished (this=0x134bec0) at ../../kio/kio/job.cpp:948
#19 0x00007fcedd322b61 in KIO::TransferJob::qt_metacall (this=0x134bec0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6c6cd850) at ./jobclasses.moc:343
#20 0x00007fcee357addc in QMetaObject::activate (sender=0x129f650, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1dc7301) at kernel/qobject.cpp:3113
#21 0x00007fcedd3e4a81 in KIO::SlaveInterface::dispatch (this=0x129f650, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#22 0x00007fcedd3e1333 in KIO::SlaveInterface::dispatch (this=0x129f650) at ../../kio/kio/slaveinterface.cpp:91
#23 0x00007fcedd3d414d in KIO::Slave::gotInput (this=0x129f650) at ../../kio/kio/slave.cpp:322
#24 0x00007fcedd3d626c in KIO::Slave::qt_metacall (this=0x129f650, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6c6cdc10) at ./slave.moc:76
#25 0x00007fcee357addc in QMetaObject::activate (sender=0x133b0f0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1dc7301) at kernel/qobject.cpp:3113
#26 0x00007fcedd2f0f57 in KIO::ConnectionPrivate::dequeue (this=0x11f09a0) at ../../kio/kio/connection.cpp:82
#27 0x00007fcedd2f107d in KIO::Connection::qt_metacall (this=0x133b0f0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x1322aa0) at ./connection.moc:73
#28 0x00007fcee35750f9 in QObject::event (this=0x133b0f0, e=0x13090a0) at kernel/qobject.cpp:1111
#29 0x00007fcee39f8efc in QApplicationPrivate::notify_helper (this=0x1097c30, receiver=0x133b0f0, e=0x13090a0) at kernel/qapplication.cpp:4056
#30 0x00007fcee3a001ce in QApplication::notify (this=0x7fff6c6ce6e0, receiver=0x133b0f0, e=0x13090a0) at kernel/qapplication.cpp:4021
#31 0x00007fcee57bbab6 in KApplication::notify (this=0x7fff6c6ce6e0, receiver=0x133b0f0, event=0x13090a0) at ../../kdeui/kernel/kapplication.cpp:302
#32 0x00007fcee3565c2c in QCoreApplication::notifyInternal (this=0x7fff6c6ce6e0, receiver=0x133b0f0, event=0x13090a0) at kernel/qcoreapplication.cpp:610
#33 0x00007fcee356680a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1037d00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#34 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1037d00) at kernel/qcoreapplication.cpp:1247
#35 0x00007fcee358e533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#36 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#37 0x00007fceda7febce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#38 0x00007fceda802598 in ?? () from /lib/libglib-2.0.so.0
#39 0x00007fceda8026c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#40 0x00007fcee358e1a6 in QEventDispatcherGlib::processEvents (this=0x1037930, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#41 0x00007fcee3a8d4be in QGuiEventDispatcherGlib::processEvents (this=0x1624a10, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#42 0x00007fcee3564532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#43 0x00007fcee3564904 in QEventLoop::exec (this=0x7fff6c6ce510, flags=) at kernel/qeventloop.cpp:201
#44 0x00007fcee3566ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#45 0x0000000000402fe9 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:146

Reported using DrKonqi