Don't attempt to match the index against a rule. This fixes problems with /index.php requests matching agagainst the %category% rewrite rules.

git-svn-id: https://develop.svn.wordpress.org/trunk@3252 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/classes.php

@@ -1470,8 +1470,12 @@ class WP {
 			if ( ! empty($pathinfo) && ($wp_rewrite->index != $pathinfo) ) {
 				$request = $pathinfo;
 			} else {
+				// If the request uri is the index, blank it out so that we don't try to match it against a rule.
+				if ( $req_uri == $wp_rewrite->index )
+					$req_uri = '';
 				$request = $req_uri;
 			}
+
 			$this->request = $request;
 
 			// Look for matches.