Index: modules/contact/contact.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/contact/contact.pages.inc,v
retrieving revision 1.4
diff -u -p -r1.4 contact.pages.inc
--- modules/contact/contact.pages.inc	2 Oct 2007 16:03:17 -0000	1.4
+++ modules/contact/contact.pages.inc	8 Dec 2007 16:23:47 -0000
@@ -64,7 +64,7 @@ function contact_mail_page() {
       }
       $form['cid'] = array('#type' => 'select',
         '#title' => t('Category'),
-        '#default_value' => $default_category,
+        '#default_value' => isset($default_category),
         '#options' => $categories,
         '#required' => TRUE,
       );