Index: trunk/include/onupdate.php
===================================================================
--- trunk/include/onupdate.php	(revision 76)
+++ trunk/include/onupdate.php	(revision 77)
@@ -49,5 +49,5 @@
 	$plugin_current = "xpressme/xpressme.php";
 	update_option('active_plugins', array($plugin_current));
-	include(dirname(__FILE__) . '/../wp-content/plugins/'.$plugin_current);
+	include_once(dirname(__FILE__) . '/../wp-content/plugins/'.$plugin_current);
 	do_action('activate_'.$plugin_current);