Well my customers just reported this so I would say right after the "g" upgrade is when I became aware of it, I just tested after upgrading to "h" and I think the same issue is happening although during my tests I could check out eventually but I would say every time I started with a fresh cart I got the ssl check message and then if I logged back in I could check out immediately, I have had a total of 3 customers complain about this recently, the first complaint was a while back an I just thought they couldn't use a computer, but all the complaints I have gotten about this were from Macintosh users using Safari. My site doesn't get that much traffic so 3 complaints is a lot to us.... and this is our first attempt at e-commerce as a company. I have noticed about 6 accounts that have been created in the past 3 months that never ordered anything, again not a lot but we only do about 3 or 4 orders a month.....