Redirect Loop, Membership on subdomain

Hello, I'm developing a membership site at I've installed WP and Membership, and set up a few placeholder pages for content. On the public side, the menu pages redirect endlessly (Chrome: "This webpage has a redirect loop"). I've tried switching to the default WP theme, and deactivating all plugins; no luck in either case. If I change the permalinks back to the WP default, then the links work.

From the forums, it sounds like this is a common problem on subdomains, but I don't see a fix listed. Thoughts?