tumblrdsbdphotom2dconv.user.js

// ==UserScript==
// @name           tumblr dsbd photo m2d conv
// @namespace      http://www.tumblr.com/
// @include        http://www.tumblr.com/dashboard*
// @include        http://www.tumblr.com/show*
// @include        http://www.tumblr.com/tumblelog*
// @include        http://www.tumblr.com/filter*
// @include        http://*.tumblr.com/*
// ==/UserScript==

(function () {
var f = function(docs) {
  for (var n = 0,nLen = docs.length;n < nLen;n++) {
    var imgTags = docs[n].getElementsByTagName('img');
    for (var i = 0, len = imgTags.length;i < len;i++){
      var img = imgTags[i];
      if (img.src.match(/media\.tumblr\.com\/(\w+)\.(\w+)$/)) {
        img.src = 'http://data.tumblr.com/' + RegExp.$1 + '.' + RegExp.$2;
      }
    }
  }
}
f([document]);
if (window.AutoPagerize) window.AutoPagerize.addFilter(f);
})();