[Plugin: Formidable Forms] Hidden action field causes conflict with login form

I placed a contact form on a custom login page (e.g., http://domain.name/wp-login.php?action=contact), but the form includes a hidden field named “action”. wp-login.php also uses the action parameter (e.g., wp-login.php?action=register), so this causes a conflict.

I’ve worked around it by registering ‘create’ as a valid action so that it directs to my callback method, but I think the proper solution would be for you to prefix your field names so that they don’t conflict with WordPress core fields or other plugins. Instead of “action” you should use something like “frm_action”.

http://wordpress.org/extend/plugins/formidable/