The tooltip for the Unanswered tab says:
questions with tags that I've participated
Surely this should be "questions with tags that I've participated in", or maybe "...that I've actively participated in".
However, I think the tags shown seem to be my favourites, not ones I've necessarily participated in. Certainly for me there's a one-to-one match between the search query and my favourites, some tags of which I've not participated in much if at all.
Should it say something like "Questions with tags that I've favourited"?
Another issue, is that since the only posts that appear are in my favourites (I think) all will be highlighted. IMO there's no point highlighting all posts. Maybe we should highlight posts with multiple matching tags?