javascript - IE 8 中的“HTML1114”错误是什么？

Question

我向 oembedly 服务器发送 GET 请求。回应是

{
    "provider_url": "https://developer.mozilla.org",
    "description": "Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value.",
    "title": "Array reduce method",
    "dominant_colors": [{
        "color": [19, 13, 12],
        "weight": 0.507080078125
    }, {
        "color": [219, 48, 41],
        "weight": 0.345458984375
    }, {
        "color": [240, 240, 240],
        "weight": 0.1474609375
    }],
    "thumbnail_width": 62,
    "url": "https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/Reduce",
    "thumbnail_url": "https://developer.mozilla.org/media/img/mdn-logo-sm.png",
    "entropy": 2.00440402346,
    "version": "1.0",
    "provider_name": "Mozilla",
    "type": "link",
    "thumbnail_height": 71
}

据我所知，一个正常的 JSON 响应。但是没有调用成功处理程序，我得到了

HTML1114: Codepage unicode from (UNICODE byte order mark) overrides conflicting codepage windows-1252 from (11) 

控制台上的该消息。

我正在运行 IE9，浏览器模式：IE8，文档模式：IE8 标准。

请让我摆脱痛苦...