I thought this was Fondation-related but there are some display issues which seem to be specific to any manage community page/subpage. Like content is quite narrower, the DW logo isn't a link to Home, the navigation menu LIs are too big in my font size and the little swirls in the drop-down are right next to the text.
I don't know if it's related. Could be there's an unclosed tag somewhere?
Otherwise this just looks so much better and I love invitations and the community homepage and just everything. They're much clearer and easier to use.