That's different thing. Attachments (which were bound to posts) have been restored. All of them I believe.
However attachment URLs have changed, and links manually embedded in the posts haven't been updated. But if you correct them by hand they'll work.
With the exception of the ones that are orphaned - when original post to which the attachment was bound have been removed (or attachment was manually taken down). In such case these files haven't been moved to the new CDN.
This is how I found it: site:sc2mapster.com "Screenshot2011-04-17_09_16_21.jpg" -"15/252/Screenshot2011-04-17_09_16_21.jpg"
(in Google) then in source code of the first result search for: class="multi-file-upload-file-image comment-attachment-image" alt="Screenshot2011-04-17_09_16_21.jpg" The preceeding src attr of img element will be correct URL. But I'm unsure if this method would work for in all cases. I think it's worth to note anyway.
(btw. this would have been easier if media.forgecdn.net was indexed by Google, but it isn't sadly).