? sites/default/files
? sites/default/settings.php
Index: modules/field/field.crud.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/field/field.crud.inc,v
retrieving revision 1.67
diff -u -p -r1.67 field.crud.inc
--- modules/field/field.crud.inc	3 Aug 2010 23:01:14 -0000	1.67
+++ modules/field/field.crud.inc	23 Aug 2010 12:53:28 -0000
@@ -667,7 +667,7 @@ function field_create_instance($instance
   // Ensure the field instance is unique within the bundle.
   // We only check for instances of active fields, since adding an instance of
   // a disabled field is not supported.
-  $prior_instance = field_read_instance($instance['entity_type'], $instance['field_name'], $instance['bundle']);
+  $prior_instance = field_info_instance($instance['entity_type'], $instance['field_name'], $instance['bundle']);
   if (!empty($prior_instance)) {
     $message = t('Attempt to create an instance of field @field_name on bundle @bundle that already has an instance of that field.', array('@field_name' => $instance['field_name'], '@bundle' => $instance['bundle']));
     throw new FieldException($message);