Funny, it never occurred to me that the top navigation bar items are actually tabs! I see that now, and I understand what you mean.
Still, the < Back button is up there next to the tabs, so why not a Summary or Home button? Going through Businesses means an additional click, and using the Back button can mean many, many clicks.
How about this, to put this issue together with the Screen Is Too Wide issue: Allow the left-nav bar to auto-collapse (or get rid of the text labels alt0gether in the left-nav bar and just go with icons and tooltips/hover-text), and put the nav-bar in its own frame so it stays in place even when the main part of the screen scrolls up or scrolls right. That way, the Summary button would be where it belongs, and it would never go away. Problem solved.
