HTML newsletters are showing HTML when opened

Sorry, forgot to put code around HTML outputted. But I think you get the idea, its only showng the HTML source when I open the mail.

<h2>Merry Christmas from SambaStream</h2>
<p><span class="inline inline-center"><img src="http://www.sambastream.com/sites/sambastream.com/files/images/SambaStream Logo.png" alt="" title=""  class="image image-_original " width="620" height="118" /></span></p><p align="justify">Hi everyone,</p><p align="justify">Thanks to all of you that subscribed to our newsletter. We wanted to take this opportunity to wish you all a very Merry Christmas to you and your families, and an excellent start to the new year! </p><p align="justify">2008 has been a fresh start for all of us, leaving our jobs with Accenture to pursue SambaStream. So far we've been working hard developing our business plan and prototype for our first product, SambaJam, an online collaboration platform. We're excited to start the new year and are currently looking for enthusiastic developers to start work in January in developing the first release of SambaJam, which we plan to launch in May! We'd love to hear from any good Java developers if you know any, so forward this on! </p><p align="justify">All the best,</p><p align="justify">Ale, David &amp; Clarence</p><div style="text-align: center"><span class="inline inline-undefined"><img src="http://www.sambastream.com/sites/sambastream.com/files/images/SambaStream_Christmas_Card.preview.jpg" alt="" title=""  class="image image-preview " width="640" height="531" /></span></div><div class="image-clear"></div>

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Thanks for that! It has fixed the issue. I just hope using the latest Dev version won't cause any other problems. Can't wait for the final release!