Ajax requests with xhrFields fail on IE8

[indrek@…]

This bug only affects IE 8.0.6001.18702CO. Notice the CO. Standard version without CO works fine.

This bug is reproducible using this:

$.ajax({
  url: "/some/url",
  type: "PUT",
  xhrFields: {
    withCredentials: false
  }
});

Only way to get it to work is by removing all keys from xhrFields.

  xhrFields: {}

[jaubourg]

I'm not versed into arcane IE8 version numbering... what does the CO stand for?

[indrek@…]

CO = Corporate administrator

"CO" means that this IE version has been admin-customised for a corporate environment by an administrator, using the Microsoft Internet Explorer Administration Kit.

I don't exactly know what it means. I just got it from Google search.

[mikesherov]

Unfortunately, without knowing specifically what the admin messed around with, it's literally impossible for us to fix this. If it works in normal IE8, it's a bug in the how the admin tweaked IE8, not a bug in jQuery. Sorry we can't help more here :-\