Server is responding with a 406 but xhr.status is showing 200, what could cause this if all exts and add-ons disabled?

I am using jQuery 2.1.0 with Firefox 24.5.0. Firefox restarted in safe mode, all add-ons and exts are disabled. I placed some debugging code in jQuery.ajaxTransport to log xhr.status. I open Web Developer -> (Console and Network), I can see a server 406 response which is showing a 200 for xhr.status.
What can cause this? What can cause Firefox to map a 406 to 200?

Additional Information: Windows 7 the HTTP Request was a POST and contained JSON in both the request and response.

Similar Messages

Maybe you are looking for