One option is to
work backwards. I saw this happen once before in a different
thread when I was trying to post an image, but the file was physically too wide for the forum's script. The image uploaded and posted, but that page became inaccessible as a result. I fixed it by editing my previous post to remove the image attachment. That may or may not be the problem here. But it could be worth a shot.
Since you can't see the previous post to click the edit button, you'll have to infer what the edit link would be. It's probably the last post to have an image. One guess would be topic 107660 msg664485, the last post made in that
thread by Din X. So, Joe, Din X, or anyone else with editing access could go to one of their own posts from the first 3 pages of that
thread, click "Modify", and then copy that address and paste it into their browser address
bar. They would then change the topic and message
part to say: msg=664485;topic=107660 . There will be several other parts of the address, but only the msg and topic parts would need to change. By clicking enter, it should bring up the option to edit that post. If from the viewpoint of the edit page it appears that Din X's post was the last one prior to the
thread crashing, simply edit away all the images or delete the post entirely. If
his post was not the last, then you can see which one was, and edit that one.
It's something of a shot in the dark, but this just reminds me so much of my previous
thread crash fixed via this method.