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I have code that uses Microsoft's XDomainRequest object in IE8. The code looks like this: var url = "http://<host>/api/acquire?<query string>"; var xdr = new XDomainRequest(); xdr.onload = function(){ $.("#identifier").text(xdr.responseText); }; xdr.open("GET", url); xdr.send(); When the scheme in "url" is "http://" the command works fine. However, when the scheme is "https://" IE8 gives me an "Access denied" JavaScript error. Both schemes work fine in FF 3.6.3, where I am, of course, using XmlHttpRequest. With both browsers I am complying with W3C Access Control. "http://" works cross origin for both browsers. So the problem is with IE8, XDomainRequest, and SSL. The SSL certificate is not the problem. If I type https:// <host >/ into the address bar of IE8, where <host > is the same as in "url" above, the page loads fine. So we have the following: - hitting https:// <host >/ directly from the browser works fine; - hitting https:// <host >/api/acquire? <query string > via XDomainRequest is not allowed. Can it be done? Am I leaving something out?

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