It had to do with some revamping of the site. It's probably all cleared up now, or most of it.
Don't ask me; all I observed was that http was suddenly changed to https on links. I have no idea why. Apparently all links are to be https now.
Frank, I think it is a direct result of the code upgrades and patches that miskie ran a couple weeks ago.
I'm not a web guy, but if you mention it to him, I suspect he may be able to do an easy redirect on all of those so it's transparent to anyone who clicks on them.