Bug 142935

Version:            (using KDE KDE 3.5.5)
Installed from:    Debian testing/unstable Packages
Compiler:          from debian etch 
OS:                Linux

steps to reproduce a crash:
point to gpg-encrypted message.
in pinetry window which is asking for password hit cancel.
see window PGP warning - Kmail, do not push any button in it.
choose another not encrypted message in kmail main window.
hit cancel in PGP warning - Kmail window.

kmail always crashing after that. here the log:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1249339168 (LWP 12945)]
[New Thread -1280853072 (LWP 12952)]
[New Thread -1272460368 (LWP 12951)]
[New Thread -1264067664 (LWP 12950)]
[New Thread -1255674960 (LWP 12949)]
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[KCrash handler]
#6  0xb7e48bfb in KMail::ObjectTreeParser::parseObjectTree ()
   from /usr/lib/libkmailprivate.so
#7  0xb7e4da63 in KMReaderWin::parseMsg () from /usr/lib/libkmailprivate.so
#8  0xb7d49d71 in KMReaderWin::displayMessage ()
   from /usr/lib/libkmailprivate.so
#9  0xb7dccc4d in KMReaderWin::updateReaderWin ()
   from /usr/lib/libkmailprivate.so
#10 0xb7e4831c in KMReaderWin::qt_invoke () from /usr/lib/libkmailprivate.so
#11 0xb70a8d4f in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb70a97e0 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#13 0xb7433e5e in QTimer::timeout () from /usr/lib/libqt-mt.so.3
#14 0xb70d0603 in QTimer::event () from /usr/lib/libqt-mt.so.3
#15 0xb7040c26 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#16 0xb7042a43 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#17 0xb7768e0e in KApplication::notify () from /usr/lib/libkdecore.so.4
#18 0xb6fd4421 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#19 0xb7033623 in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#20 0xb6fe876f in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#21 0xb705b179 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#22 0xb705af9a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#23 0xb70427bf in QApplication::exec () from /usr/lib/libqt-mt.so.3
#24 0x0804a094 in ?? ()
#25 0xbf8e39d4 in ?? ()
#26 0xbf8e3bc0 in ?? ()
#27 0x00000000 in ?? ()