class.upload.php is a powerful and mature PHP class to manage uploaded files, and manipulate images in many ways. The script is available under a GPL license.
So they may not be standard JPEG files... I'd be interested in having one of these files. You can send it to me by email and I'll keep it confidential.Reply
The files in question are quite sensitive, however I'll see if there any that I could send, to potentially avoid the situation in the future.