Comment on Technical Support by SEO Dave.
It’s just a notice there’s no styling which is the default for WordPress RSS feeds. The Stallion theme doesn’t deliberately (stating that in case I missed something :-)) change the RSS feeds.
If you install TwentyEleven and check an RSS feed you’ll find the same “This XML file does not appear to have any style information associated with it. The document tree is shown below.” notice in Google Chrome.
Load a ‘plain’ RSS feed in
Firefox and the browser adds it’s own styling.
Internet Explorer and the browser adds it’s own styling that’s different to Firefox.
Safari and the browser adds it’s own styling that’s different to Firefox and IE.
Opera and the browser adds it’s own styling that’s different to Safari, Firefox and IE.
No idea why Google Chrome is the only browser that lacks it’s own RSS feed styling? Not looked into if there’s a way to add styling at theme or plugin level. With Google Chrome a major browser player probably worth looking into since currently it’s showing the raw XML data which means links aren’t clickable etc…
Edit: you can check an RSS feed for errors at sites like http://feedvalidator.org