It is a bit strange, but apparently it depends if you open the site map coming from the English or the German version. Either way, the English OR the German root directory is missing. See for yourself: http://blog.gensoup.com/sitemap_index.xml (The blog is brand new, so there are only two articles and a test page there). Probably it is not much of a deal, but it shouldn't be that way either, am I right? :-)
Michael