Index: edit_question_form.php
===================================================================
RCS file: /cvsroot/moodle/moodle/question/type/edit_question_form.php,v
retrieving revision 1.33
diff -u -r1.33 edit_question_form.php
--- edit_question_form.php	25 Aug 2010 15:21:33 -0000	1.33
+++ edit_question_form.php	16 Sep 2010 19:22:29 -0000
@@ -362,7 +362,7 @@
         if (is_array($extra_question_fields) && !empty($question->options)) {
             array_shift($extra_question_fields);
             foreach ($extra_question_fields as $field) {
-                if (!empty($question->options->$field)) {
+                if (isset($question->options->$field)) {
                     $question->$field = $question->options->$field;
                 }
             }