Once I click continue, I get a secure connection.For some reason you are not establishing an HTTPS session to the site. I know it supports HTTPS because I am using HTTPS to reach the site.
I'm going to clear the cache and see if that works.I believe Macrosill previously mentioned clearing the cache after upgrading the site awhile back.
Still unusably slow!This site has been unusably slow for large portions of today as well as yesterday. I would imagine all sorts of errors are possible when pages aren't loading.