Saw something new this morning, have a site that has ssl but we only use it on our order pages.
Looking at the serps this morning and our home page is listed as and linked to the https version instead of the normal http version. This is new, never seen them do this before.
We have no internal links to https versions of any pages on the site other than the order pages. AFAIK we have no external links coming in that point to the https version either.