Does RSS/XML work for Antville.org blogs?

I have read in Antville that the orange XML button leads to RDF structured code for an RSS feed. I have also read in the help that this functionality is not available to blogs at Antville.org, but why does it work at help.antville.org?

In the past, I am certain I could click on the XML button to find RDF structured code, but this no longer works. Has antville switched it off or have I have broken it with my customisation?

If antville have not switched it off, how do I get it to work again?

Thanks in Advance, John