I started testing this site to see how V5 appears and one of my areas of attention are the navigation header and breadcrumbs.

I clicked on all the Header navigation sections, Forum, Blogs, All Activity, My Activity Streams, and then through all the items in More.

When you click on Blogs, there is no breadcrumb, i.e. Home → Blogs

When you click on Providers Directory, there is no header navigation whatsoever. There is a breadcrumb.

Some of these may well be intentional, as the site is actually a mix of more than one site. Will let Ehren reply more, but I suspect this may be the case