JQuery AJAX exception only in Firefox: “Node cannot be inserted at the specified point in the hierarchy” (HierarchyRequestError)

Question

Very strange problem: I have a 2-part dropdown, where selecting a State will then add a second dropdown giving you a list of MSA Areas in that State.

This is done us

Answer 1

I had the same problem in FF only. My Servlet was returning back text with a content type "text". FF interprets this as text/xml and tries to insert xml in the body - hence the error

I changed the content type to text/plain - all is well