Index: wp-includes/load.php
===================================================================
--- load.php	(revision 15821)
+++ load.php	(working copy)
@@ -487,7 +487,7 @@
 		array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
 	}
 
-	if ( empty( $active_plugins ) || defined( 'WP_INSTALLING' ) )
+	if ( empty( $active_plugins ) )
 		return $plugins;
 
 	foreach ( $active_plugins as $plugin ) {