Index: sites/all/modules/default_filter/default_filter.module
===================================================================
RCS file: /cvs/drupal/contributions/modules/default_filter/default_filter.module,v
retrieving revision 1.4
diff -u -r1.4 default_filter.module
--- sites/all/modules/default_filter/default_filter.module	8 Aug 2007 13:20:03 -0000	1.4
+++ sites/all/modules/default_filter/default_filter.module	25 Aug 2007 13:54:14 -0000
@@ -240,7 +240,7 @@
 	if($op == 'insert'){
 		$format = default_filter_retrieve($node->type);
 		if($format > 0){
-			$node->format = $format;
+     db_query('UPDATE {node_revisions} SET format = %d WHERE nid = %d', $format, $node->nid);
 		}
 	}
 }