[Deprecated] Taberareloo 用パッチ： Tumblr のポストの仕様変更に対応させる。 *Taberareloo v3.0.7 で対応されました。と思ったら、完全版では無かったので、再度有効化。v3.0.9 で対応。

patch.model.tumblr.post.tbrl.js

// ==Taberareloo==
// {
//   "name"        : "Fix Post to Tumblr"
// , "description" : "Follow the latest change to post to Tumblr"
// , "include"     : ["background"]
// , "version"     : "0.2.6"
// , "downloadURL" : "https://gist.github.com/YungSang/7920406/raw/patch.model.tumblr.post.tbrl.js"
// }
// ==/Taberareloo==

(function() {
  var version = chrome.runtime.getManifest().version;
  if (semver.gte(version, '3.0.9')) {
    alert("This patch has been merged into Taberareloo 3.0.9. Going to uninstall it.");
    Patches.uninstall(Patches['patch.model.tumblr.post.tbrl.js']);
    return;
  }

  update(Models['Tumblr'], {
    _post : function (form) {
     return request(Tumblr.TUMBLR_URL + 'svc/secure_form_key', {
        method  : 'POST',
        headers : {
          'X-tumblr-form-key' : form.form_key
        }
      }).addCallback(function (res) {
        var secure_form_key = res.getResponseHeader('X-tumblr-secure-form-key');
        return request(Tumblr.TUMBLR_URL + 'svc/post/update', {
          headers     : {
            'Content-Type'     : 'application/json',
            'X-tumblr-puppies' : secure_form_key
          },
          sendContent : JSON.stringify(form)
        });
      });
    },

    post : function (ps) {
      var self = this;
      if(TBRL.Config.post['tumblr_default_quote']){
        ps = update({}, ps);
        ps.flavors = update({}, ps.flavors);
        delete ps['flavors']['html'];
      }
      var endpoint = Tumblr.TUMBLR_URL + 'new/' + ps.type;
      return this.postForm(function(){
        return self.getForm(endpoint).addCallback(function postUpdate(form){
          var type;
          type = ps.type.capitalize();
          return Tumblr[type].convertToForm(ps).addCallback(function(form2){
            // merging forms
            update(form, form2);
            self.appendTags(form, ps);

            if (TBRL.Config.post.multi_tumblelogs && !Tumblr.blogs.some(function(id){ return id === form.channel_id; })) {
              throw new Error(chrome.i18n.getMessage('error_notLoggedin', form.channel_id));
            }

            return (function () {
              if (type === 'Photo') {
                if (form['photo[]']) {
                  return request(Tumblr.TUMBLR_URL + 'svc/post/upload_photo', {
                    sendContent: form
                  }).addCallback(function(res){
                    var response = JSON.parse(res.response);

                    if (response.meta && response.meta.msg === 'OK' && response.meta.status === 200) {
                      delete form['photo[]'];
                      form['images[o1]'] = response.response[0].url;
                      form['post[photoset_layout]'] = '1';
                      form['post[photoset_order]'] = 'o1';

                      return self._post(form);
                    }

                    return res;
                  });
                } else {
                  form['images[o1]'] = form['photo_src[]'];
                  form['post[photoset_layout]'] = '1';
                  form['post[photoset_order]'] = 'o1';
                }
              }

              return self._post(form);
            }()).addErrback(function(err){
              if (self.retry) {
                throw err;
              }

              Tumblr.form_key = Tumblr.channel_id = null;
              self.retry = true;

              return self.getForm(endpoint).addCallback(postUpdate);
            });
          });
        });
      });
    },

    favor : function (ps) {
      // メモをreblogフォームの適切なフィールドの末尾に追加する
      var form = ps.favorite.form;
      var that = this;

      this.trimReblogInfo(form);

      return Tumblr[ps.type.capitalize()].convertToForm({
        description : ps.description
      }).addCallback(function(res) {
        items(res).forEach(function(item) {
          var name = item[0], value = item[1];
          if (!value) {
            return;
          }
          if (form[name]) {
            form[name] += '\n\n' + value;
          }
          else {
            form[name] = value;
          }
        });
        that.appendTags(form, ps);
        return that.postForm(function(){
          return that._post(form);
        });
      });
    }
  });

  var jobs    = [];
  var posting = false;

  addAround(Models['Tumblr'], '_post', function(proceed, args, target, methodName) {
    var deferred = new Deferred();
    jobs.push({
      deferred : deferred,
      proceed  : proceed,
      args     : args,
      target   : target
    });
    return deferred;
  });
 
  setInterval(function () {
    if (posting || (jobs.length === 0)) {
      return;
    }
    posting = true;
    var job = jobs.shift();
    job.proceed(job.args).addCallback(function (res) {
      job.deferred.callback(res);
      posting = false;
    }).addErrback(function (e) {
      job.deferred.errback(e);
      posting = false;
    });
  }, 500);
})();

https://gist.github.com/Constellation/7932734 こんなもんでどうでしょ?