--- optionwidgets.module	2011-03-13 13:50:16.000000000 +1100
+++ optionwidgets.module-2.9	2011-03-13 12:49:59.000000000 +1100
@@ -349,11 +349,10 @@ function optionwidgets_data2form($elemen
   $keys = array();
   foreach ($values as $value) {
     $key = array_search($value, array_keys($options));
-    if (isset($key) && $value) {
+    if (isset($key)) {
       $keys[] = $value;
     }
   }
-
   if ($field['multiple'] || $element['#type'] == 'optionwidgets_onoff') {
     return array($field_key => $keys);
   }
@@ -454,4 +453,4 @@ function theme_optionwidgets_onoff($elem
 
 function theme_optionwidgets_buttons($element) {
   return $element['#children'];
-}
+}
\ No newline at end of file