Error when trying to parse visible messages

When clicking the "parse visible messages again" button on the filters page I get the following errors:

• warning: array_fill() [function.array-fill]: Number of elements must be positive in ******/includes/database.inc on line 241.
• warning: implode() [function.implode]: Bad arguments. in ******/includes/database.inc on line 241.
• warning: array_keys() [function.array-keys]: The first argument should be an array in ******/modules/user/user.module on line 514.
• 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 p.perm FROM role r INNER JOIN permission p ON p.rid = r.rid WHERE r.rid IN () in ******/modules/user/user.module on line 514.