I can't get dojo's ajax features working properly using dojo.xhrGet, dojo.xhrPost, and dojo.rawXhrPost. They seem to be working fine in Firefox 2 but the response object is different in IE 7. Here is an example:

My Ajax call:

the returned xml
<person name='Fred'><age>24</age><weight>180</weight></person>

The response handler function
function getLoad(response, ioArgs){
var table = document.createElement("table");
var tbody = document.createElement("tbody");
var tr,td,text;
table.appendChild(tbody);

tr = document.createElement("tr");

//get xml tags
********//IE 7 does not get past the next line *********
var person = response.getElementsByTagName("person")[0].getAttribute("name");
var age = response.getElementsByTagName("age")[0].firstChild.nodeValue;
var weight = response.getElementsByTagName("weight")[0].firstChild.nodeValue;

td = document.createElement("td");
td.appendChild(document.createTextNode(person));
tr.appendChild(td);
td = document.createElement("td");
td.appendChild(document.createTextNode(age));
tr.appendChild(td);
td = document.createElement("td");
td.appendChild(document.createTextNode(weight));
tr.appendChild(td);

tbody.appendChild(tr);
dojo.byId("xhrGet").appendChild(table);
}