I made a change to my profile email addy a couple minutes ago, and the board did its usual thing with verifying the address. However, when I returned to the board index (before the email was verified), GB disappeared from my view. After I checked my email and did the verification, I hit Refresh, and GB still didn't pop up. Finally, I just logged out and logged back in, and GB popped back up.
Just something I found odd and thought it might be useful information.