That's correct JMF, you can't for the moment. Now if you look close you'll see that the last post in that thread was dated October 11th. And as you might have guessed by yours truly myself.
I'm not sure if there's a connection, but lately more threads disappear and get closed after I've posted something in them. But if a whole subsection gets closed that's weird indeed. Perhaps someone hit the wrong button. I suggest in the meantime you could post your stuff under website feedback.
Don't loose even 1 minute sleep over it, as I don't too. I even sleep better now that I know that every post of mine is doublechecked.