Content Type Not being set on JSONP Request From Two Different Ports

This situation is killing me. A JSONP Jquery Ajax request from http://example.com:80 to http://example1.com:8080 never sets the Content Type and Spring MVC complains on the server when trying to serialize my javabean in the controller parameter. If I test the JSONP request on either website calling the same domain, it sets the content type. Is this a port issue? I am testing a WordPress site to Spring MVC API on my local.

handlerMapperInvoker.java – This is where the error occurs in the Spring Framework

MediaType contentType = inputMessage.getHeaders().getContentType();
        if (contentType == null) {
            StringBuilder builder = new StringBuilder(ClassUtils.getShortName(methodParam.getParameterType()));
            String paramName = methodParam.getParameterName();
            if (paramName != null) {
                builder.append(' ');
                builder.append(paramName);
            }
            throw new HttpMediaTypeNotSupportedException(
                    "Cannot extract parameter (" + builder.toString() + "): no Content-Type found");
    }

apicontroller.java – API Side

@RequestMapping(value="/badge/get")
public @ResponseBody IHttpResponse getBadge(@RequestBody GetBadgeRequest request) {

    apiService.getBadge(request);

    return request.getResponse();
}

api.js – WordPress

getBadge : function(id) {

        var model = 
        {
            id : id
        };

        this.call({ url: 'badge/get.json', type: 'GET', data: model, callback: function(data)
        {
            alert(data);
        }});
    },

call : function(options) {

        var def = {
            url : '',
            type : "POST",
            dataType : 'jsonp',
            data : undefined,
            contentType : "application/json",
            callback : function() {},
            errorCallback : function() {}
        };

        $.extend(def, options);

        var sessionToken = api.getSession();

        if(sessionToken && sessionToken != "undefined") {
            if(!def.data) {
                def.data = {};
            }

            def.data.sessionToken = sessionToken;
        }

        var url = config.baseUrl + def.url;

        // Abort Request If Another One Is Made
        if (config.request != null)
            config.request.abort();

        if (def.showLoader) {
            application.loader(true);
        }

        config.request = $
                .ajax({
                    url : url,
                    type : def.type,
                    data : { request: $.toJSON(def.data) },
                    dataType : def.dataType,
                    contentType : def.contentType,
                    success : function(data) {
                        if (def.showLoader) {