--- fb.module	2010-04-27 01:38:00.000000000 -0400
+++ fb.new.module	2010-04-27 09:04:00.000000000 -0400
@@ -153,7 +153,7 @@ function fb_api_init($fb_app, $fbu = FB_
   // or at least not overwrite previously declared handler.
   set_exception_handler('fb_handle_exception');
   
-  if (!count($cache)) {
+  if (!count($cache) && !class_exists('Facebook')) {
     $filename = variable_get('fb_api_file', 'facebook-platform/php/facebook.php');
     if (!include($filename)) {
       $message = t('Failed to find the Facebook client libraries at %filename.  Read the !readme and follow the instructions carefully.', array(