So I recently noticed there is a blue-ish "sign in/join" button that I can see badly placed and that even while connected, I'm not sure if it was here before the forum upgrade or not because I hadn't paid attention to that before.
Image to show what I see:
BZTHgc6.png
Right under the "Log out" & "My Profile" button.
Not a biggie but still a little bit disturbing once you notice it :S.