Error after site login

After site login I got that error:

* warning: array_keys() [function.array-keys]: The first argument should be an array in /home/webapp/drupal-sites/modules/user/user.module on line 368.
* warning: implode() [function.implode]: Invalid arguments passed in /home/webapp/drupal-sites/modules/user/user.module on line 368.
* user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 query: SELECT DISTINCT(p.perm) FROM role r INNER JOIN permission p ON p.rid = r.rid WHERE r.rid IN () in /home/webapp/drupal-sites/includes/database.mysql.inc on line 172.