diff --git a/wp-admin/includes/ms.php b/wp-admin/includes/ms.php
index 54853198e9..58778ec7b8 100644
--- a/wp-admin/includes/ms.php
+++ b/wp-admin/includes/ms.php
@@ -576,7 +576,7 @@ function mu_options( $options ) {
 add_filter( 'whitelist_options', 'mu_options' );
 
 function check_import_new_users( $permission ) {
-	if ( !is_site_admin() )
+	if ( !is_super_admin() )
 		return false;
 	return true;
 }
@@ -648,7 +648,7 @@ remove_action( 'media_buttons', 'media_buttons' );
 
 /* Warn the admin if SECRET SALT information is missing from wp-config.php */
 function secret_salt_warning() {
-	if( !is_site_admin() )
+	if( !is_super_admin() )
 		return;
 	$secret_keys = array( 'NONCE_KEY', 'AUTH_KEY', 'AUTH_SALT', 'LOGGED_IN_KEY', 'LOGGED_IN_SALT', 'SECURE_AUTH_KEY', 'SECURE_AUTH_SALT' );
 	$out = '';
@@ -714,7 +714,7 @@ function admin_notice_feed() {
 		$link = clean_url( strip_tags( $item['link'] ) );
 		$msg .= "<p>" . $content . " <a href='$link'>" . __( 'Read More' ) . "</a> <a href='index.php?feed_dismiss=" . md5( $item[ 'title' ] ) . "'>" . __( "Dismiss" ) . "</a></p>";
 		echo "<div class='updated fade'>$msg</div>";
-	} elseif( is_site_admin() ) {
+	} elseif( is_super_admin() ) {
 		printf("<div id='update-nag'>" . __("Your feed at %s is empty.") . "</div>", wp_specialchars( $url ));
 	}
 }
@@ -722,7 +722,7 @@ add_action( 'admin_notices', 'admin_notice_feed' );
 
 function site_admin_notice() {
 	global $current_user, $wp_db_version;
-	if( !is_site_admin() )
+	if( !is_super_admin() )
 		return false;
 	printf("<div id='update-nag'>" . __("Hi %s! You're logged in as a site administrator.") . "</div>", $current_user->user_login);
 	if ( get_site_option( 'wpmu_upgrade_site' ) != $wp_db_version ) {
@@ -812,7 +812,7 @@ add_action( 'deactivate_invalid_plugin', 'deactivate_sitewide_plugin' );
  * Adds the "Activate plugin site wide" row for each plugin in the inactive plugins list.
  */
 function add_sitewide_activate_row( $file, $plugin_data, $context ) {
-	if ( !is_site_admin() )
+	if ( !is_super_admin() )
 		return false;
 
 	if ( 'sitewide-active' == $context )
@@ -859,7 +859,7 @@ function is_wpmu_sitewide_plugin( $file ) {
 function list_activate_sitewide_plugins() {
 	$all_plugins = get_plugins();
 
-	if ( !is_site_admin() )
+	if ( !is_super_admin() )
 		return false;
 
 	$active_sitewide_plugins = maybe_unserialize( get_site_option( 'active_sitewide_plugins') );
@@ -963,7 +963,7 @@ function sitewide_filter_inactive_plugins_list( $inactive_plugins ) {
 	}
 
 	/* Now unset any sitewide only plugins if the user is not a site admin */
-	if ( !is_site_admin() ) {
+	if ( !is_super_admin() ) {
 		foreach ( $inactive_plugins as $plugin_name => $activated_time ) {
 			if ( is_wpmu_sitewide_plugin( $plugin_name ) )
 				unset( $inactive_plugins[ $plugin_name ] );
@@ -1006,7 +1006,7 @@ function check_is_wpmu_plugin_on_activate() {
 		deactivate_plugins( $_GET['plugin'], true );
 
 		/* Silently activate because the activate_* hook has already run. */
-		if ( is_site_admin() ) {
+		if ( is_super_admin() ) {
 			$_GET['sitewide'] = true;
 			activate_sitewide_plugin( $_GET['plugin'], true );
 		}
@@ -1024,7 +1024,7 @@ function check_wpmu_plugins_on_bulk_activate( $plugins ) {
 			if ( is_wpmu_sitewide_plugin( $plugin ) ) {
 				deactivate_plugins( $plugin );
 
-				if ( is_site_admin() )
+				if ( is_super_admin() )
 					activate_sitewide_plugin( $plugin );
 			}
 		}
@@ -1090,7 +1090,7 @@ function disable_some_pages() {
 	global $messages;
 
 	if ( strpos( $_SERVER['PHP_SELF'], 'user-new.php' ) && !get_site_option( 'add_new_users' ) ) {
-		if ( is_site_admin() ) {
+		if ( is_super_admin() ) {
 			$messages[] = '<div id="message" class="updated fade"><p>' . __( 'Warning! Only site administrators may see this page. Everyone else will see a <em>page disabled</em> message. Enable it again on <a href="ms-options.php#addnewusers">the options page</a>.' ) . '</p></div>';
 		} else {
 			wp_die( __('Page disabled by the administrator') );
@@ -1106,7 +1106,7 @@ function disable_some_pages() {
 
 	$pages = array( 'theme-install.php', 'plugin-install.php' );
 	foreach( $pages as $page ) {
-		if ( strpos( $_SERVER['PHP_SELF'], $page ) && !is_site_admin() ) {
+		if ( strpos( $_SERVER['PHP_SELF'], $page ) && !is_super_admin() ) {
 			wp_die( __( "Sorry, you're not allowed here." ) );
 		}
 	}
@@ -1247,7 +1247,7 @@ function stripslashes_from_options( $blog_id ) {
 add_action( 'wpmu_upgrade_site', 'stripslashes_from_options' );
 
 function show_post_thumbnail_warning() {
-	if ( false == is_site_admin() ) {
+	if ( false == is_super_admin() ) {
 		return;
 	}
 	$mu_media_buttons = get_site_option( 'mu_media_buttons', array() );
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index d024d69a00..8119420a0c 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -1025,7 +1025,7 @@ function wpmu_validate_blog_signup($blogname, $blog_title, $user = '') {
 	if( in_array( $blogname, $illegal_names ) == true ) {
 	    $errors->add('blogname',  __("That name is not allowed"));
 	}
-	if( strlen( $blogname ) < 4 && !is_site_admin() ) {
+	if( strlen( $blogname ) < 4 && !is_super_admin() ) {
 	    $errors->add('blogname',  __("Blog name must be at least 4 characters"));
 	}
 
@@ -1305,7 +1305,7 @@ function wpmu_create_blog($domain, $path, $title, $user_id, $meta = '', $site_id
 
 	update_option( 'blog_public', $meta['public'] );
 
-	if ( !is_site_admin() && get_usermeta( $user_id, 'primary_blog' ) == get_site_option( 'dashboard_blog', 1 ) )
+	if ( !is_super_admin() && get_usermeta( $user_id, 'primary_blog' ) == get_site_option( 'dashboard_blog', 1 ) )
 		update_usermeta( $user_id, 'primary_blog', $blog_id );
 
 	restore_current_blog();
@@ -1522,7 +1522,7 @@ function install_blog_defaults($blog_id, $user_id) {
 	$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id != %d AND meta_key = %s", $user_id, $table_prefix.'capabilities') );
 
 	// Delete any caps that snuck into the previously active blog. (Hardcoded to blog 1 for now.) TODO: Get previous_blog_id.
-	if ( !is_site_admin( $user->user_login ) && $user_id != 1 )
+	if ( !is_super_admin( $user->user_login ) && $user_id != 1 )
 		$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $wpdb->base_prefix.'1_capabilities') );
 
 	$wpdb->suppress_errors( false );
@@ -1927,7 +1927,7 @@ function upload_is_file_too_big( $upload ) {
 }
 
 function wordpressmu_authenticate_siteadmin( $user, $password = '' ) {
-	if( is_site_admin( $user->user_login ) == false && ( $primary_blog = get_usermeta( $user->user_id, "primary_blog" ) ) ) {
+	if( is_super_admin( $user->user_login ) == false && ( $primary_blog = get_usermeta( $user->user_id, "primary_blog" ) ) ) {
 		$details = get_blog_details( $primary_blog );
 		if( is_object( $details ) && $details->spam == 1 ) {
 			return new WP_Error('blog_suspended', __('Blog Suspended.'));
diff --git a/wp-signup.php b/wp-signup.php
index 61abcc0757..71d7002425 100755
--- a/wp-signup.php
+++ b/wp-signup.php
@@ -374,7 +374,7 @@ if( !$active_signup )
 
 $active_signup = apply_filters( 'wpmu_active_signup', $active_signup ); // return "all", "none", "blog" or "user"
 
-if( is_site_admin() )
+if( is_super_admin() )
 	echo '<div class="mu_alert">' . sprintf( __( "Greetings Site Administrator! You are currently allowing '%s' registrations. To change or disable registration go to your <a href='wp-admin/ms-options.php'>Options page</a>." ), $active_signup ) . '</div>';
 
 $newblogname = isset($_GET['new']) ? strtolower(preg_replace('/^-|-$|[^-a-zA-Z0-9]/', '', $_GET['new'])) : null;
diff --git a/xmlrpc.php b/xmlrpc.php
index 7700696c51..5bf8209262 100644
--- a/xmlrpc.php
+++ b/xmlrpc.php
@@ -443,7 +443,7 @@ class wp_xmlrpc_server extends IXR_Server {
 	 */
 	function wp_getUsersBlogs( $args ) {
 		// If this isn't on WPMU then just use blogger_getUsersBlogs
-		if( !function_exists( 'is_site_admin' ) ) {
+		if( !is_multisite() ) {
 			array_unshift( $args, 1 );
 			return $this->blogger_getUsersBlogs( $args );
 		}