I solved my own problem, I think. Or Auctiva fixed it.
I had cleared my browser cache before posting my original message, but I didn't think about the Java cache. Just cleared it, and now the feature works.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .