Pale Moon browser which is similar to Firefox. The links are not redirecting again today. I had to go to the main page and the yellow sign in works on that page now but the entire page is much more narrow than this and other pages like the main forum directory.

I tried disabling 2 suspect add-ons but it did not help.

Edit: I may have found the issue. If I visit RCU with Noscript blocking on and it sets a cookie and then allow rcuniverse.com and ajax.googleapis.com in noscript all the ways to log in above don't work until I delete the RCU cookies. It must set a cookie that doesn't change after allowing the scripts. The yellow sign in / sign out is still a no go and the mixed content is still present on the ssl pages.