--- D:\temp\fbconnect\fbconnect.module
+++ D:\WWW\site\sites\all\modules\fbconnect\fbconnect.module
@@ -436,7 +436,7 @@
  * @return array
  */
 function _is_fbconnect_user($fbuid) {
-  return db_result(db_query('SELECT u.uid FROM {users} u INNER JOIN {fbconnect_users} f ON u.uid = f.uid WHERE fbuid = %d AND u.status = 1', $fbuid));
+  return db_result(db_query('SELECT u.uid FROM {users} u INNER JOIN {fbconnect_users} f ON u.uid = f.uid WHERE fbuid = %s AND u.status = 1', $fbuid));
 }
 
 /**
@@ -449,7 +449,7 @@
  */
 function fbconnect_register($uid, $fbuid) {
   db_query('DELETE FROM {fbconnect_users} WHERE uid = %d', $uid);
-  return db_query('INSERT INTO {fbconnect_users} (uid, fbuid, timestamp) VALUES (%d, %d, %d)', $uid, $fbuid, time());
\ No newline at end of file
+  return db_query('INSERT INTO {fbconnect_users} (uid, fbuid, timestamp) VALUES (%d, %s, %d)', $uid, $fbuid, time());
\ No newline at end of file
 }
 
 /**