? patch.patch
Index: includes/content.node_form.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck/includes/Attic/content.node_form.inc,v
retrieving revision 1.7.2.19.2.6
diff -u -p -r1.7.2.19.2.6 content.node_form.inc
--- includes/content.node_form.inc	29 Dec 2009 09:03:15 -0000	1.7.2.19.2.6
+++ includes/content.node_form.inc	2 Mar 2010 23:30:02 -0000
@@ -361,7 +361,9 @@ function content_multiple_value_nodeapi_
   $items_copy = $items;
 
   // Filter out items flagged for removal.
-  $items = content_set_empty($field, $items);
+  if ($field) {
+    $items = content_set_empty($field, $items);
+  }
 
   // Enforce field requirement settings.
   if ($field['required'] && empty($node->_content_ignore_required_fields[$field_name]) && content_access('edit', $field, NULL, $node)) {