This works in Safari, FF, Chrome, etc.:
setrawcookie('mycookie', 'myvalue', time() + 31556926);
This does not work in FF or Chrome:
setrawcookie('mycookie', 'myvalue', time() + 31556926, '/', '.localhost');
I have been using PHP for quite some time, and have never seen this behavior before.
Works now, was an issue with .localhost instead of .somedomain.com - updated the original question to reflect the broken code. (Morning coffee not kicked in yet)