In order to expedite analysis, I sent myself a couple of PMs and downloaded the XML archive. Curiously, Internet Explorer renders the XML verbatim using its default stylesheet, whereas Mozilla removes the message body from its CDATA section, escapes the XML entities (<, >, and &), and appends the message body text directly to the message element. In both cases, the browser renders a "data-only" presentation because that's what its default stylesheet is
supposed to do. If you want the data in a "pretty" format, such as an HTML table, then you need to write your own XSL stylesheet and run an XSLT transform against the XML document using that stylesheet. See the XSLT tutorial at
http://www.w3schools.com/xsl/default.asp for more on this.