I realize there is another question with the same title, but my situation is very different. The problem started on three of my computers after upgrading from Leopard to Snow Leopard. I can login to gmail and facebook using https with no problem. I can not login to https://identi.ca/main/login or https://seminars.wolfram.com/ or https://panopticlick.eff.org with Safari, works fine with Firefox. Already tried "Safari Reset..." Any ideas?