Version:            (using KDE KDE 3.5.0)
Installed from:    Compiled From Sources
Compiler:          gcc 4.0.2 
OS:                Linux

I was prompted to send an acknowledgement of a received message. When I clicked Send, kmail crashed. I received the message and read it into kmail several days ago, but only today looked at it. After clicking on the message in the message list, I clicked on the next message. Then I clicked on the original message (I think) again before clicking Send acknowledgement. It's just possible that I selected the wrong message before clicking Send.

(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".
(no debugging symbols found)
[snip]
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1250031392 (LWP 5089)]
[New Thread -1277297744 (LWP 5100)]
[New Thread -1268909136 (LWP 5099)]
[New Thread -1260520528 (LWP 5098)]
[New Thread -1252131920 (LWP 5097)]
(no debugging symbols found)
[snip]
(no debugging symbols found)
[KCrash handler]
#3  0xb71a84f4 in DwStrcasecmp () from /opt/kde3.5/lib/libmimelib.so.1
#4  0xb71a8589 in DwHeaders::FindField () from /opt/kde3.5/lib/libmimelib.so.1
#5  0xb7b6eb21 in KMMessage::headerField ()
   from /opt/kde3.5/lib/libkmailprivate.so
#6  0xb7b7a29f in KMMessage::identityUoid ()
   from /opt/kde3.5/lib/libkmailprivate.so
#7  0xb7b7f801 in KMMessage::createMDN ()
   from /opt/kde3.5/lib/libkmailprivate.so
#8  0xb7c5596d in KMReaderWin::slotTouchMessage ()
   from /opt/kde3.5/lib/libkmailprivate.so
#9  0xb7c58808 in KMReaderWin::qt_invoke ()
   from /opt/kde3.5/lib/libkmailprivate.so
#10 0xb601d7a9 in QObject::activate_signal ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#11 0xb601dc44 in QObject::activate_signal ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#12 0xb634fd29 in QTimer::timeout () from /opt/qt-3.3.4/lib/libqt-mt.so.3
#13 0xb604105e in QTimer::event () from /opt/qt-3.3.4/lib/libqt-mt.so.3
#14 0xb5fc006a in QApplication::internalNotify ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#15 0xb5fc09ff in QApplication::notify () from /opt/qt-3.3.4/lib/libqt-mt.so.3
#16 0xb66da642 in KApplication::notify () from /opt/kde3.5/lib/libkdecore.so.4
#17 0xb5fb4ded in QEventLoop::activateTimers ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#18 0xb5f702ae in QEventLoop::processEvents ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#19 0xb5fd64d4 in QEventLoop::enterLoop ()
   from /opt/qt-3.3.4/lib/libqt-mt.so.3
#20 0xb5fd63f6 in QEventLoop::exec () from /opt/qt-3.3.4/lib/libqt-mt.so.3
#21 0xb5fbfa7f in QApplication::exec () from /opt/qt-3.3.4/lib/libqt-mt.so.3
#22 0x0804a762 in ?? ()
#23 0xbfa73328 in ?? ()
#24 0xbfa73514 in ?? ()
#25 0x00000000 in ?? ()