Ugh. This is driving me crazy! I have the exact same problem, but that new item file doesn't fix it. I am trying to let users download a 40MB file and a couple 20MB ones, so it seems this should fix the problem, but it doesn't. I still get the blank file. Help, please?
Oh well, I decided to just make an html file that they will open that will auto-refresh to the right file, and download normally. It works fine.