If you are working with the code from svn trunk this is now fixed. (Do svn update to get latest code then rebuild). Even though the url for this feed would indicate RSS, its actually an atom feed and there was a bug in the handling of the case where the contents is not included as an element in the feed, then it it is null. In this case the feed has no content elements but only summary elements, so the fix is to use the summary if content is null.
Best,
Joe