I am a programmer using CakePHP,Developed a Site who have Facebook connect and you can create an account from it.. on all browsers We have no problems at all but in IE9 everytime you logged in the site thinks is a new user.

When i came back from facebook with an user who already create an account before, the site interpreted is a new user and try to create a new account

there is some knew issue about it?

thx in advise.