Index: webform.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/webform/webform.module,v
retrieving revision 1.124.2.67
diff -u -r1.124.2.67 webform.module
--- webform.module	3 Nov 2008 16:59:43 -0000	1.124.2.67
+++ webform.module	18 Nov 2008 01:05:42 -0000
@@ -611,6 +611,10 @@
     $node->nid = NULL;
   }
 
+  if (isset($node->build_mode) && $node->build_mode == NODE_BUILD_PREVIEW && $node->webform['enforce_limit'] == 'no') {
+    $node->webform['submit_limit'] = -1;
+  }
+
   /* Save Components in a value (helps with clone.module) */
   $form['webform']['components'] = array(
     '#type' => 'value',