OK, I looked at Tanker Builder's thread, and I can see that Reply/Quick Reply are hidden, but only on your reply posts. The other replies show the buttons. Your signature photo is rendered as a large image, of which I can only see the left-hand side the photo. Again, if I refresh the page, the buttons are revealed, but more interestingly, your signature images are now rendered completely and in a smaller thumbnail size.
I think the issue is with the forum processing your photos. Not that you are doing anything incorrect, but that forum should be able to handle the photos but doesn't.