Index: modules/comment/comment.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/comment/comment.install,v
retrieving revision 1.65
diff -u -p -r1.65 comment.install
--- modules/comment/comment.install	7 Apr 2010 14:36:16 -0000	1.65
+++ modules/comment/comment.install	9 Apr 2010 19:20:07 -0000
@@ -69,7 +69,7 @@ function comment_enable() {
   //   and a comment_field_attach_create_bundle() function should be added to
   //   handle the creation of the comment body field instance.
   foreach (node_type_get_types() as $type => $info) {
-    if (!($info->is_new) && !($info->disabled) && !field_info_instance('comment', 'comment_body', 'comment_node_' . $info->type)) {
+    if (isset($info->is_new) && isset($info->disabled) && !field_info_instance('comment', 'comment_body', 'comment_node_' . $info->type)) {
       _comment_body_field_instance_create($info);
     }
   }