Index: bp-core/bp-core-filters.php
===================================================================
--- bp-core/bp-core-filters.php	(revision 7730)
+++ bp-core/bp-core-filters.php	(working copy)
@@ -98,6 +98,32 @@
 }
 add_filter( 'wp_list_pages_excludes', 'bp_core_exclude_pages' );
 
+
+function bp_core_exclude_pages_from_nav_menu_admin( $object = null ) {
+
+	// Bail if not the root blog
+	if ( ! bp_is_root_blog() )
+		return $object;
+
+	if ( 'page' != $object->name )
+		return $object;
+
+	$bp = buddypress();
+
+	if ( !empty( $bp->pages->activate ) )
+		$pages[] = $bp->pages->activate->id;
+
+	if ( !empty( $bp->pages->register ) )
+		$pages[] = $bp->pages->register->id;
+	
+	if( !empty( $pages ) )
+		$object->_default_query['post__not_in'] = $pages;
+
+	return $object;
+}
+
+add_filter( 'nav_menu_meta_box_object', 'bp_core_exclude_pages_from_nav_menu_admin', 11, 1 );
+
 /**
  * Set "From" name in outgoing email to the site name.
  *