One more suggestion!

[gev]

Add http request header "X-Requested-With" with value "XMLHttpRequest" for datasets and dynamic forms to know on server that request AJAX client.
May be when dataset's transport is "RPCTransport.XMLHTTPREQUEST".


Example:

public Object transformRequest(DSRequest dsRequest){
        
        Map<String, String> headers = new HashMap<String, String>();
        headers.put("X-Requested-With", "XMLHttpRequest");

        dsRequest.setHttpHeaders(headers);
	return super.transformRequest(dsRequest);

}

P.S. just most AJAX frameworks do it.