Why is WP7 WebBrowser InvokeScript call throwing Error: 80020101?
SystemException was unhandled
An unknown error has occurred. Error: 80020101.

MyBrowser.InvokeScript("getData", "/Me/Feed?numberOfResults=-1", "MyFeed");

function getData(url, context) {
    $.ajax({
        url: url,
        dataType: 'jsonp',
        success: function (result) {
            callback(result, context);
        }
    });
}

MyBrowser.InvokeScript("postData", "thedata", "CreatePost");

function postData(payload, context) {
    $.ajax({
        type: "POST",
        url: "/Post/Create?" + tz(),
        data: payload,
        dataType:"json",
        success:function (result) {
            callback(result, context);
        }
    });
}

postData("sampledata", "PostTest");

Dispatcher.BeginInvoke(() =>
{
    MyBrowser.InvokeScript("postData", "thedata", "CreatePost");
});