According to Linda, the issue is that Sage doesn't have a way to test the download privately before release. So they post it to their KB hoping nobody notices. I'm guessing that they internally test the download prior to sending the email notice of the new release.
I told Linda - send 90 Minds the link and we'll have 30 to 40 people test it overnight and give you all the feedback (and more) that you'd ever need....