I think I'm going to have to put a ticket in for this. I've been playing around with this and I know where the uploaded attachments are and I figured out how it generates the on-server file names that you never see from the front-end. But, I cannot figure out where it's keeping the data that's preventing it from seeing the new location or why it's affecting only some of the files. I can pull them up when I drop in the long url with the encoded file name into the browser, but not when I use the friendly url. I've done all sorts of database searches and nuthin'.
I'll keep you updated.