Redirect Loop Error on front page (home) only

Everything with s2member seems to work for me, except the following issue:

The site I’m working on has a combination of Level 0 and Level 1 pages, as well as pages that should be free of all access control (i.e. no Page Level Restriction set for that page). There is a static page selected for the front page on WP > Options > Reading, and this page has no Page Level Restriction set.

All other pages seem to work correctly, either loading normally or redirecting to the s2member options page, depending on if a Page Level Restriction is selected, except the page set as the front page, which throws a 301 redirect loop until the browser times out.

If I change the front page to a different page, the NEW front page has the same error, and the old home page loads normally, so I think it’s something with the “/” URL rewrite specifically.

The root .htaccess file is as follows:

# BEGIN s2Member GZIP exclusions

	RewriteEngine On
	RewriteBase /
	RewriteCond %{QUERY_STRING} (^|?|&)s2member_file_download=.+
	RewriteRule .* - [E=no-gzip:1]

# END s2Member GZIP exclusions

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]


# END WordPress

Any help would be appreciated.