Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 17158)
+++ wp-includes/post.php	(working copy)
@@ -2050,7 +2050,7 @@
 	if ( $post['post_status'] == 'trash' )
 		return false;
 
-	do_action('trash_post', $post_id);
+	do_action('wp_trash_post', $post_id);
 
 	add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']);
 	add_post_meta($post_id,'_wp_trash_meta_time', time());