If you try to open a feed entry (e.g. from a feed reader app) that is served via feedsportal.com in the browser, the requests gets blocked and the article will not display.
For instance this RSS feed from winfuture.de:
You can simply copy this URL into the Android browser and try to open it: http://rss.feedsportal.com/c/617/f/8093 ... tory01.htm
It looks like it wants to redirect to da.feedsportal.com but gets blocked by the ||da.feedsportal.com^$~subdocument filter in EasyList (I just tested without the filter) and the page never loads. As far as I can tell this filter should not cause such an issue.