Web and WebWorks Development

[alwaysvip]

The following works on the iphone to get access to cookies in the response:

$.ajax({
            contentType: "application/json; charset=utf-8",
            url: 'http://mydomain.com/mypath',
            success: function(data, textStatus, jqXHR) {
                var cookies = jqXHR.getResponseHeader('Set-Cookie')
            },
            cache: false,
            dataType: 'json'
        })

However, on the BlackBerry 10 Alpha Device and the Blackberry 10 Alpha Device simulator, cookies is null. I have

<access uri="http://mydomain.com" subdomains="true" />

Is this a permission issue or does BlackBerry just not support this?