Index: image.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/image/Attic/image.module,v
retrieving revision 1.322.2.4
diff -u -p -r1.322.2.4 image.module
--- image.module	18 Aug 2010 16:40:06 -0000	1.322.2.4
+++ image.module	21 Dec 2010 03:16:48 -0000
@@ -355,6 +355,7 @@ function image_form(&$node, $form_state)
     '#title' => t('Image'),
     '#size' => 40,
     '#description' => t('Select an image to upload.'),
+    '#required' => empty($node->nid),
   );
   $form['image']['rebuild_images'] = array(
     '#type' => 'checkbox',