GAE 1.2.8 fixes Mail but not JAXB

Since 1.2.8 my work-around for decoding incoming Mail correctly is no longer required. In fact, in 1.2.8, that code now breaks! My example, which only needs a text/plain message or the first part of a multipart message, now looks like this:
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Properties props = new Properties(); 
        Session session = Session.getDefaultInstance(props, null); 
        MimeMessage message = new MimeMessage(session, request.getInputStream());

        Address[] from = message.getFrom();
        String fromAddress = "";
        if (from.length > 0) {
            fromAddress = from[0].toString();
        Object content = message.getContent();
        String contentText = "";
        if (content instanceof String) {
            contentText = (String)content;
        } else if (content instanceof Multipart) {
            Multipart multipart = (Multipart)content;
            Part part = multipart.getBodyPart(0);
            Object partContent = part.getContent();
            if (partContent instanceof String) {
                contentText = (String)partContent;
        logger.info("Received email from=["+fromAddress+"] subject=["+message.getSubject()+"]");
        logger.info("Content: "+contentText);
        return null;

The key to this fix is that the calls to getContent() now return the correct object type. So in my case I'm only interested in text/plain and therefore just Strings.

Sadly JAXB still doesn't work so I'll continue to use Simple XML and wait for 1.2.9.

UPDATE: JAXB support was fixed on December 10th without updating the version number.
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