Index: bp-core-buddybar.php
===================================================================
--- bp-core-buddybar.php	(revision 4829)
+++ bp-core-buddybar.php	(working copy)
@@ -80,7 +80,7 @@
 			add_action( 'bp_screens', array( &$screen_function[0], $screen_function[1] ), 3 );
 
 		if ( !empty( $default_subnav_slug ) )
-			$bp->current_action = $default_subnav_slug;
+			$bp->current_action = apply_filters('component_default_subnav', $default_subnav_slug);
 	}
 }