They seem to be doodling about with the interface on here. It posts someone's new message, then shows it again as "all Posts" right below the original, etc. Plus, this "reply" box is now boinked between every post. Lots more space being taken up for redundant info, lots more scrolling to get to the responses.
This was a test since the PTC Community push across something to try and fix it. Here is a post talking about it:
They are quite a few things. Like the Drag photos/files here box below when you are replying. Also there is a next topic arrow on the "2nd" post.