Meneame.net (kind of a digg clone) includes a brief description and link to the original post for every entry. Since a couple weeks ago newsblur is not parsing this particular rss correctly and neither the description nor the link are shown.
Looks OK to me: http://www.newsblur.com/site/5585360/. Might have been temporarily on their side.
Oh, now I see it’s working for the feed view but not for the text view. Since this is my only feed configured for text view I assume I changed it by mistake at some point.