dojo.xhrGet handle as javascript ie8 not returning

I have:

dojo.xhrGet({
    url:"/data/js/1/markers.js",
    handleAs:"javascript",
    load: function(r){
        dojo.forEach(placemarks, function(item) {

Which works开发者_C百科 fine in Chrome, FF and Safari but not IE. Error placemarks is undefined is given. If I log r it gives me the first object in my array placemarks.

Am I missing something with IE or do I need to set a special header?

Dojo doesn't eval javascript globably when it comes back, so any variables must be assigned to the window:

window.placemarks = ...