Hey there,

First of all, your a live saver. Thanks so much for writing this. Our team has to support IE8+ and cross domain requests has been a crappy issue to deal with.

This library seems to work perfectly so far, however I needed to set jQuery.support.cors = true to get it to work properly.

Not sure if this is the case for many other people, but it might be worth looking into adding it right beside useXDomainRequest = true;