The default RSS template refers to $.Site.Author.name, however when I specify this author in my top level config.toml no author name appears in the rendered RSS XML.
and if so is it AFTER all the root config options? (root = those without [sectionname] parts).
Please post the whole config. I did not check the default RSS layout now, but if it indeed refers to $.Site.Author.name then the issue is in your config file(s).