nelsonmenezes/jQuery-ajaxTransport-XDomainRequest — pull request #1 by chadmott (2013-01-02 23:16:44+00:00)
Title: IE9 Abort bug solution

adapted from http://www.cypressnorth.com/blog/web-programming-and-development/internet-explorer-aborting-ajax-requests-fixed/

I have tested in ie8/9 and this seems to work for me...