Thanks for the heads-up. I was wondering about this, because it had been a previous feature for sure. I think it had just been reset in our settings panel from an old update on the site. It should be back now, with a much larger preview image + a display of the image name as a caption.
I've attached a sample image below as a test as well.
The "detach" link removes the attachment from the reply, but the item will still exist on our servers. (It's a Wordpress thing.) "Delete" will actually remove it completely. I can see how the language is confusing. Will see what I can do about this.
As for the #-of-downloads counter; that's an interesting idea. I'll look into it, too. Thanks for the suggestion.