Tough to say, something tells me though that you used the term "revised the image". Did you ever upload the original, and did that one go thru? Are you your uploading the jpg or png, not a psd or something. Also, maybe if it is a revision try changing the name, to Image2.jpg or something, just in case there's a cache issue. Things like that, otherwise just move all your files except that image into a new folder, then create and save that image there again. Or something like that, just brainstorming until you get it thru.