When I logged in today I saw a new frequented tag on the right side:
This causes questions having the 'android' tag to be highlighted. Example of highlighted questions:
But I don't want that. How do I remove the tag?
It because you haven't set any "Interesting" or "Ignored" tags. The system is trying to work out what questions you might find interesting based on your previous viewing/answering habits.
If you follow the "set tag preferences" link and set up just one tag in either "Interesting" or "Ignored" the system will use this tag set for highlighting purposes.
Seconding the comment by fluteflute, but it needs to be an answer.
Over on Ask Different, I'm generally interested in the whole subject matter, so I do not want any highlighting nor shading of topics. The fact that I'm coerced into it now is absolutely frustrating.
PLEASE make this a preference, or at least give us the ability to remove these 'frequented' tags. I like the concept, but on such a specific site as Ask Different, it's exceedingly unnecessary for me.
Not to mention that I think it's horribly flawed. I've answered/asked/edited countless iphone, ipad, ios tagged questions. Yet one day after Lion comes out it's already "frequented" for me? Perhaps it's just the lack of knowledge of how exactly it's determined. And that doesn't help either.