I installed a new version of WordPress on a subdomain (history.keithkeirstead.com). I was going through the options enabling and applying the ones that I wanted. When I got to enabling XML-RPC posting I checked the box and then clicked save changes. This gave me a 404 error. It directs me from /wp_admin/options_writing.php to /wp-admin/options.php and displays an error like a missing blog post. I am able to enable the atom publishing just fine, but not the XML-RPC. Does anybody know how to fix this? Or whats causing the problem? Thanks!