The trophies are kind of generic and there's 8 or 9 of them (look at "View all Trophies") in that window. They can't be opened and the entire category seems unnecessary to me. It's similar to the "Thanks" button in the old system ("The user thanks Roy for this useful post").
Great to be back on the site!
When I open the What's New tab to only read the most recent posts, I am given a window to enter a post, whether I had planned to or not. Did I do something wrong or is this just for convenience?