ion_auth total problem

I've just found the cause myself.

I have a redirect to www.site.com for site.com requests in htaccess file. $config["base_url"] was set to 'site.com'. Do not know why but the forms with action="http://site.com/..." do not work because $_POST has been emptied. On my other CI driven sites all config[base_url] vars are empty. The changing base_url by addition 'www.' was the remedy.

Uffff!