In case you needed any more reasons to throw the RSS baby out with the bathwater,
apparently you're not allowed to publish your feed in more than one language.
The RSS validator is otherwise pretty useful since it pointed out errors I might have noticed around the
time that Hell freezes over. But on the language issue, I will not bend; validators be damned (I like to
think that my contribution to RSS was lobbying to have multiple <language> elements added to RSS 0.91)