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Currently, the Frequently Asked Questions list on the Meta homepage looks like this:
But the very first question on that list isn't tagged with faq at all!
Is this a bug, or can questions without the special tag appear in that list?
Because it's featured. And that's how the FAQ list works on Meta: it includes faq entries, and featured posts.
This behavior predates the introduction of the Community Bulletin board, and no one has been bothered enough to change it.