I tried that but am getting the same errors. If it was a column name issue, wouldn't that cause it to work in ie9 either?
Here is the modified script. Please let me know if you see anything wrong.
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="/_LAYOUTS/1033/SCRIPTS/spservices/jquery.SPServices-0.7.2.min.js"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function() {
$().SPServices.SPCascadeDropdowns({
relationshipList: "Employees",
relationshipListParentColumn: "Title",
relationshipListChildColumn: "DepartmentName",
parentColumn: "Employee",
childColumn: "Department",
selectSingleOption: true,
debug:true
});
});
</script>