Almost every time I leave a board's main page, with all the threads listed, and open up a specific post, I can't return to the board's page by hitting the "back" key. Hitting the "back" key does nothing. I stay right where I am, and I find that this is a problem unique to Chowhound. I have no trouble navigating backwards on the several other sites that keep me from being productive during the workday, such as Facebook, MSN and whatever. Any suggestion?