Hacker News 50 feed ( http://feeds.feedburner.com/hacker-ne... ) pushes a huge amount of stories into Newsblur, none of them properly linked or with content. The Feedparses seems to have a problem there.
HN's feed changed. I verified this today. Unfortunately, there's not much I can do. They are now publishing base urls and full urls with an unusual encoding. So they are getting clobbered because the encoding effectively hides the fact that it's a fully qualified domain name (fqdn).