使用腾讯微博时遇到了这个问题，微博无法发布， 返回 {"data":null,"errcode":-100,"msg":"check sign error","ret":3} 。 腾讯官方没有对应此错误的说明，遂问谷姐、度娘; 发现一堆类似错误， 如下：
{"data":null,"errcode":-22,"msg":"check sign error","ret":3} http://open.t.qq.com/bbs/forum.php?mod=viewthread&tid=53443&highlight=check%2Bsign%2Berror
{"data":null,"errcode":-111,"msg":"check sign error","ret":3} http://open.t.qq.com/bbs/forum.php?mod=viewthread&tid=12831
{"data":null,"errcode":-102,"msg":"check sign error","ret":3} http://open.t.qq.com/bbs/forum.php?mod=viewthread&tid=12626
{"data":null,"errcode":-103,"msg":"check sign error","ret":3} http://blog.csdn.net/codestiny/article/details/6675518
{"data":null,"errcode":-3180,"msg":"check sign error","ret":3} http://www.eoeandroid.com/forum.php?mod=viewthread&tid=167636
{"data":null,"errcode":-3133,"msg":"check sign error","ret":3} http://open.t.qq.com/bbs/forum.php?mod=viewthread&tid=52641&highlight=check%2Bsign%2Berror
这个问题很诡异，不是每次都发生， 我用的是oAuth2.0, 所传参数如下：
https://open.t.qq.com/api/t/add_pic?format=json&content=xx&oauth_consumer_key=xxx&access_token=xxx&openid=xxx&clientip=127.0.0.1&oauth_version=2.a&scope=all看了下官方文档http://wiki.open.t.qq.com/index.php/API%E6%96%87%E6%A1%A3#category_3， 以为是没传clientip引起，又把clientip加上，发现错误依旧。
腾讯啊, 这么多未知的异常, 这不是折腾开发者么..