[Note: I've discovered why, now the question is how? See below]
I've noticed in the last few days a number of questions being greyed out, such as the example below. There are no downvotes on them, that I can see.
Is this a bug, or a feature?
I am using Firefox 8.0.
ETA: I just realized that I had the regex tag on my "ignore tag" list, where I sure did not put it. It's always been on my favourite list, and before, questions tagged perl + regex have been red/pink. I've no idea how regex ended up on my ignore list.
I guess this changes my question to: How did "regex" move from my favourite tag list to my ignore tag list? Not sure if I should edit the question more to reflext this.