Thank you Helena, this works, appreciated. But now I suppose all the many hundred links in old posts need to be updated !
No, those links will still not work as they will give that proxy error issue. A better solution to make those images work again on this forum is to upload those images on TalkImg.com, however most of the users who uploaded those images don't really care about updating the images in their posts that's why they're not uploading those on TalkImg.com.