If I click on the axoman avatar, and from there, click on the axoman name, I get to see a list of activity. And sure enough, the post I made in the Enclosure thread is listed among my actvity and if I click on it, I am taken to the Enclosure thread.
So it's still there, sort of, but I cannot access it through normal means, which in turn probably means that the forum database is messed-up. In addition, no matter what I try, the Crazy-Face smiley I last used this morning, has disappeared from the smiley window (it is normally on page two of the smiley window).