I’ve been having issues with a blank(ish) PDF being returned. I was able to get around by putting in the fivefilters URL as described in the plugin. This either adds a “made with fivefilters” to the heading, or the default method doesn’t get as far as adding it… which is a shame, I’d like it without!
I’m able to see the RSS feed through my browser, but wget’ing the URL you provided returns a 403 Forbidden error. What should I be opening up on the server? Permissions?