I'm not aware of any such change. If it has changed then it's almost certainly unintended. We'll look into it.I like that the updated version of the forum now shows a list of similar threads when posting a new thread, as I had suggested.
However, I don't like that now there are no restrictions at all on necroposting, and I'm surprised that no one else has mentioned this. Was this the result of a discussion among the moderators, or what exactly happened?