IE8 through 10 does not send the right content type for betCredits CORS requests

Sending a bet credit request through betCredits via CORS will faill on IE10 if the request is sent with XDomainRequest, that method does not send other content types than text/plain.

See this link for more information: http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx