I have looked everywhere and don't see this issue addressed. I saw the issue with progress bar and veiewstateenable and also the issue with the upload not working if the https certificate is not trusted.
But this is just an issue with the progress bar not updating when the upload is via https. Everything works fine if it is a regular http: request.
Try gcendo.com/newupload/myupload1.aspx with and without https and you will see what I mean...