New Log in glitch?

For the past three days, I've gone to the log-in page, clicked on log in and the result is a completely empty, white page with the exception of an avatar in the very upper left corner: yesterday it was a white iMac, today the Finder icon (with a note at the bottom of the browser "javascript: avatar etc etc". There is no menu bar or anything else clickable. If I then go to my bookmarks bar (Firefox) and hit any one of the A D related bookmarks, it immediately takes me to that page and I'm signed in.