At first glance, this is a subtle change. But as you scroll around the site, you'll see something different: your "user navigation" bar -- which shows your user name, notifications and messages -- follows you around and sticks to the top of your browser window.
Here's the home page. Notice the page title and Communities marker are on the same line as your user-profile info, condensing some of the vertical space that this information occupies.
And on other pages, as you scroll vertically, you'll see that the board title and user info floats at the top of your page so you always know two things: who you are and where you are.
We know that this change (like many changes) might take a little getting used to, but we hope that it helps you to get to the "meat" of the content a little bit faster. We're chipping away at the top part of the page that's currently the prelude to the content you want. Let us know what you think. We'll continue to tweak with updates based on your feedback and our observations about how you're using the communities site.