I checked this question answered by badp. The answer on that was less than satisfactory. :-)
I just saw a bounty from badp on this. The reason was the current answers were out of date.
How does one know to revise their answer on a question? Do they get informed via the red Inbox notification? What happens if no one revises their answers to a question? Can we ask the same question again or will it get closed as a duplicate?