Index: optionwidgets.module
===================================================================
retrieving revision 1.69.2.27
diff -u -r1.69.2.27 optionwidgets.module
--- optionwidgets.module	11 Sep 2009 09:00:56 -0000	1.69.2.27
+++ optionwidgets.module	23 Mar 2010 10:24:34 -0000
@@ -292,7 +292,7 @@
     '#title' => isset($options[$on_value]) ? $options[$on_value] : '',
     '#description' => $element['#description'],
     '#required' => isset($element['#required']) ? $element['#required'] : $field['required'],
-    '#default_value' => isset($element['#value'][$field_key][0]) ? $element['#value'][$field_key][0] == $on_value : FALSE,
+    '#default_value' => (isset($element['#value'][$field_key][0]) && ($element['#value'][$field_key][0] == $on_value)) ? $on_value : FALSE,
     '#return_value' => $on_value,
   );