New Post: SPServices 2013.01 - Test

Okay. Did some more testings. I use the below code (in CEWP) on a clean SP2010 machine. The result is the same... blank screen. If I change SPServices bck to .7.2, it works. You can try it with the below code but change the userLoginName.

<script language="javascript" src="/_layouts/jquery/jquery-1.8.3.min.js" type="text/javascript"></script>
<script language="javascript" src="/_layouts/jquery/jquery.SPServices-2013.01.min.js" type="text/javascript"></script>

<script language="javascript" type="text/javascript">
    waitMessage = "<table width='100%' align='center'><tr><td align='center'><img src='/_layouts/images/gears_an.gif'/></td></tr></table>";
    $("#WSOutput").html(waitMessage).SPServices({
        operation: "GetUserInfo",
        userLoginName: "__MYDOMAIN\USERNAME__",
        completefunc: function (xData, Status) {
            $("#WSOutput").html("").append("<b>This is the output from the GetUserInfo operation:</b>");
            $(xData.responseXML).find("User").each(function() {
                $("#WSOutput").append("<li>ID: " + $(this).attr("ID") + "</li>");
                $("#WSOutput").append("<li>Sid: " + $(this).attr("Sid") + "</li>");
                $("#WSOutput").append("<li>Name: " + $(this).attr("Name") + "</li>");
                $("#WSOutput").append("<li>LoginName: " + $(this).attr("LoginName") + "</li>");
                $("#WSOutput").append("<li>Email: " + $(this).attr("Email") + "</li>");
                $("#WSOutput").append("<li>Notes: " + $(this).attr("Notes") + "</li>");
                $("#WSOutput").append("<li>IsSiteAdmin: " + $(this).attr("IsSiteAdmin") + "</li>");
                $("#WSOutput").append("<li>IsDomainGroup: " + $(this).attr("IsDomainGroup") + "</li>");
                $("#WSOutput").append("<hr/>");
            });
        }
    });
</script>

<ul id="WSOutput"/>