Codeigniter 2.0 CSRF Problem

[eluser]lennierb5[/eluser]
My form action is correct since I use form_open() from the Form Helper. This problem arises when the base_url does not match where the user is currently. If the user is at http://mydomain.com/myproject and tries to login with a form action of http://www.mydomain.com/myproject or http://myip/myproject it produces the error.