There was an open missing which lead to the famous chain of horror: the parent

folder was not open so the job opened it, the messagelist was
regenerated, the message became invalid, yada yada.
BUGS: 129028

svn path=/branches/KDE/3.5/kdepim/; revision=552126

kmfolderimap.cpp

@@ -1450,6 +1450,7 @@ void KMFolderImap::slotGetMessagesData(KIO::Job * job, const QByteArray & data)
       if ( ok && exists < count() ) {
         kdDebug(5006) << "KMFolderImap::slotGetMessagesData - server has less messages (" <<
           exists << ") then folder (" << count() << "), so reload" << endl;
+        open();
         reallyGetFolder( QString::null );
         (*it).cdata.remove(0, pos);
         return;