There used to be 3 buttons vertically aligned linking to subscriptions and the forum and something else, next to the logo. Now they are in a bar across the top and the overall layout seems to be more defined.
I do a little mucking about with web sites so perhaps I'm more tuned in to noticing. It seemed like a pretty big change when I first looked but perhaps it's just a very minor thing that's cleaned up the presentation around the edges.