Ultimately I closed my browser to resolve the issue. Another note, when I did try to log in next I entered my name but my password did not auto-populate as it normally should. I manually entered my password, logged in and everything was fine. I was able to log out, and when I typed my name to log back in, my password automatically populated.
I have been unable to reproduce this issue. I have a clean install of RC2. The only add-ons installed are XenPorta/Medio/Atendo.