I have 2 sites
This is a multi website set up on one magento instance.
site.com.au works as expected, you can login and add items to the cart.
site.com.au I configured like this
cookie path = / cookie domain = site.com.au
www.example.com.au I have no sessions. i.e cannot login or add anything to the cart
www.example.com.au I have it configured like this
cookie path = / cookie domain = .example.com.au
What am I doing wrong?