Index: sites/all/modules/contrib/cck_select_other/cck_select_other.module
===================================================================
--- sites/all/modules/contrib/cck_select_other/cck_select_other.module	(revision 107)
+++ sites/all/modules/contrib/cck_select_other/cck_select_other.module	(working copy)
@@ -164,9 +164,10 @@
   $field_name = $element['#parents'][0];
   $langcode = $element['#parents'][1];
   $delta = $element['#parents'][2];
+	$num = $element['#parents'][3];
 
-  if ($form_state['values'][$field_name][$langcode][$delta]['select_other_list'] == 'other' && empty($form_state['values'][$field_name][$langcode]['select_other_text_input'])) {
-    form_set_error($field_name . '[' . $langcode . '][' . $delta . '][select_other_text_input]', t('A non-empty value is required for this option.'));
+	if ($form_state['values'][$field_name][$langcode][$delta][$num]['select_other_list'] == 'other' && empty($form_state['values'][$field_name][$langcode][$delta][$num]['select_other_text_input'])) {
+    form_set_error($element['#name'], t('A non-empty value is required for this option.'));
   }
 }