Having php-setup session.auto_start variable = 1 causes exception

[coert]

Having php-setup session.auto_start variable = 1 causes exception

Captcha seems to try to restart the session, which causes an exception in the Session-class of Kohana.

See also: http://dev.kohanaframework.org/issues/3349

Quick solution is, obviously, to set session.auto_start variable = 0 in php.ini , but this really needs to be fixed in Captcha I guess.