After logging in with my username and password from drupal.org I get the following warnings:
* warning: array_keys() [function.array-keys]: The first argument should be an array in /../modules/user/user.module on line 378.
* warning: array_fill() [function.array-fill]: Number of elements must be positive in /../modules/user/user.module on line 379.
* warning: implode() [function.implode]: Bad arguments. in /../modules/user/user.module on line 379.
* 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 /../includes/database.mysql.inc on line 172.