--- functions/mailbox_display.php~	2009-05-23 22:11:41.000000000 +0200
+++ functions/mailbox_display.php	2009-07-22 21:15:47.000000000 +0200
@@ -756,6 +756,7 @@
 
     if (!$auto_expunge) {
         echo getButton('SUBMIT', 'expungeButton',_("Expunge")) ."\n";
+        echo getButton('SUBMIT', 'undeleteButton',_("Undelete")) ."\n";
     }
 
     echo getButton('SUBMIT', 'markRead',_("Read")) . "\n";