I think (but don't remember for sure) that it was Dan who mentioned that it was an intermittent bug (but one whose effect is nice for speed!), not something that happened on purpose.

Another "No" oddity: If I post ANY reply in ANY of the fora in FT Travel when "No" is present, then the reply shows up immediately when I am taken back to the thread after posting. But when "No" is absent, I have to manually refresh the page to see my reply.

Maybe there's a clue there somewhere.