Multisite WordPress 3.5.2 Redirect Loop in main blog

I just installed a multisite with WP3.5.2

I’m getting a redirect loop when trying to access the main site.
Subblog’s work just fine. All of the previous threads I can find refer to sublog’s and have not helped.

I have another account on the same host (hostmonster)that works just fine.
The only difference is that I installed ver 3.5.1 and upgraded to 3.5.2.

Any ideas?