The feed seems to display all available sizes of the enclosed image. This happened for http://newsblur.com/site/690384/india… , for example. 
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Heh, that’s a good one. What would you expect, though? The feed is providing the images. I don’t think I should only display the biggest one.
i also see this on http://www.abc.net.au/news/feed/51120…
the rss has a with multiple elements, one of which will have a isDefault attribute set to “true”.
http://www.rssboard.org/media-rss#med…