Index: signup.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/signup/signup.module,v
retrieving revision 1.115
diff -u -r1.115 signup.module
--- signup.module	14 Aug 2007 07:17:54 -0000	1.115
+++ signup.module	16 Oct 2007 08:25:25 -0000
@@ -324,18 +324,18 @@
 function _signup_initialize_event_backend() {
   define('SIGNUP_PATH', drupal_get_path('module', 'signup'));
   if (defined('EVENT_API') && EVENT_API == '5.2') {
-    include(SIGNUP_PATH .'/signup_event_5.x-2.inc');
+    include_once(SIGNUP_PATH .'/signup_event_5.x-2.inc');
   }
   else if (module_exists('event')) {
-    include(SIGNUP_PATH .'/signup_event_5.x-1.inc');
+    include_once(SIGNUP_PATH .'/signup_event_5.x-1.inc');
   }
   else if (module_exists('date')) {
     // include(SIGNUP_PATH .'/signup_date.inc');
     // Until date.module support exists, fall back to the no event case.
-    include(SIGNUP_PATH .'/signup_event_none.inc');
+    include_once(SIGNUP_PATH .'/signup_event_none.inc');
   }
   else {
-    include(SIGNUP_PATH .'/signup_event_none.inc');
+    include_once(SIGNUP_PATH .'/signup_event_none.inc');
   }
 }