I,m having a similar problem. I seems I’m logged in as I can see my admin toolbar at the top of the site but when I try to get back inside the admin area at http://warrensmaindomain.com/wp-admin it redirects to http://warrensmaindomain.com/wp-admin/upgrade.php?_wp_http_referer=%2Fwp-admin%2Findex.php. All the dashboard links redirect also always starting with http://warrensmaindomain.com/wp-admin/upgrade.php?_wp_http_referer=
It seemed to happen after a one click wordpress update.
I’ll keep your problem in mind while I try to figure out. I been looking through files all morning. Hostgator support said it looked like I was missing a plugin at /home1/wemarg/public_html/wp-content/plugins/wp-comcentral/ but that didn’t make much sense to me. Plus I never had that plugin installed. Hopefully Someone can help us both at once.
