Inconsistent Rated 3 out of 5 stars

I've been using this addon satisfactorily for about 2 years, but it no longer works. With the latest version (4.1.1) and FF 3.53, only some of the feeds show up in the sidebar. Unfortunately, I can't determine which ones don't appear. It's not entire websites, just some feeds from various websites. Sure hope this gets fixed, otherwise I'll have to find something else so I don't miss RSS updates I need.

This review is for a previous version of the add-on (4.1.1).