New Post: SP3 (for SharePoint 2010) broke my SPCascadeDropdowns

That alert returns "null" right before the function errors out. I'm using Chrome (newest) and have some experience writing and debugging JavaScript, although it has been a while since I have. The error is the same (although reported differently) in IE11.

DOM Ready: Yes, the code is wrapped in "$(document).ready(function() {" and it WAS working for over a year on SP1 of SharePoint 2010. This only started happening after upgrading to SP2. ,,_ My code that calls "$().SPServices.SPCascadeDropdowns".

In fact, here is my code:

<script type="text/javascript"> 
    $(document).ready(function() {
        $().SPServices.SPCascadeDropdowns({
            relationshipList: "{902421AC-9B8C-41D5-9452-EA2B71EB43E8}",
            relationshipListParentColumn: "Department",
            relationshipListChildColumn: "Title",
            parentColumn: "Department_",
            childColumn: "Category_",
            simpleChild: true,
            debug: true
        });
        $().SPServices.SPCascadeDropdowns({
            relationshipList: "{7CFFAF21-F75F-4D6B-897B-A1B461B47389}",
            relationshipListParentColumn: "Category",
            relationshipListChildColumn: "Title",
            parentColumn: "Category_",
            childColumn: "Sub-Category_",
            simpleChild: true,
            debug: true
        });
//    alert("jQuery loaded");
    });
</script>