diff -r f507feede89a -r 09a1c134465b web/wp-admin/admin.php
--- a/web/wp-admin/admin.php	Wed Dec 19 12:35:13 2012 -0800
+++ b/web/wp-admin/admin.php	Wed Dec 19 17:46:52 2012 -0800
@@ -29,6 +29,8 @@
 
 require_once(dirname(dirname(__FILE__)) . '/wp-load.php');
 
+nocache_headers();
+
 if ( get_option('db_upgraded') ) {
 	flush_rewrite_rules();
 	update_option( 'db_upgraded',  false );
@@ -51,6 +53,7 @@
 		 * @since 2.8.4b
 		 */
 		$c = get_blog_count();
+		// If 50 or fewer sites, run every time. Else, run "about ten percent" of the time. Shh, don't check that math.
 		if ( $c <= 50 || ( $c > 50 && mt_rand( 0, (int)( $c / 50 ) ) == 1 ) ) {
 			require_once( ABSPATH . WPINC . '/http.php' );
 			$response = wp_remote_get( admin_url( 'upgrade.php?step=1' ), array( 'timeout' => 120, 'httpversion' => '1.1' ) );
@@ -65,8 +68,6 @@
 
 auth_redirect();
 
-nocache_headers();
-
 // Schedule trash collection
 if ( !wp_next_scheduled('wp_scheduled_delete') && !defined('WP_INSTALLING') )
 	wp_schedule_event(time(), 'daily', 'wp_scheduled_delete');
@@ -79,7 +80,6 @@
 wp_reset_vars(array('profile', 'redirect', 'redirect_url', 'a', 'text', 'trackback', 'pingback'));
 
 wp_enqueue_script( 'common' );
-wp_enqueue_script( 'jquery-color' );
 
 $editing = false;
 
@@ -187,6 +187,8 @@
 		exit;
 	}
 
+	do_action( 'load-importer-' . $importer );
+
 	$parent_file = 'tools.php';
 	$submenu_file = 'import.php';
 	$title = __('Import');