Hi all, the star button below other players posts (you don't see it on your own posts) is called a reputation button (you can use a search engine to find more info if you're interested). Elsa has added it (probably only temporarily) as well as the date change format. We're just testing some new features.
So, what happens is you click on the star you can add a comment about the post - I tested it on someone here (can't rememember who! sorry!) and left an "I approve". It's adds a green box next to your name. The more other players click on the "I approve" button, the more green boxes you get. If you want to test it, use posts here in this thread . I couldn't find where I can see the comments you can also leave, but maybe that feature is still turned off. Not sure. It's an interesting button, but not sure it has value here. What I was looking at was a Like/Thanks feature which for our forum would be more practical.
I'll make a new thread so you can practice and have fun in. If the feature is removed, then I can just delete the thread. Don't leave any mean comments though ok even if you use the "I disapprove" button.
edit:
Don't know why the green button isn't visible when you leave then come back to the thread? This message came up: "You cannot give Reputation to the same post twice."