Quote Problems with the Arcade? I have seen many complaints that submitted scores are rejected with the explanation "Game doesn't exist".

I suspect this is down to the cheat-prevention in place - you will get such a message when you revisit a page for a game you've just played (usually by pressing "back").

If you click "Play again" from the scores page you will not get the message. You can also avoid it by refreshing the game page after you have got there through the back key.

Please tell me if you have any problems with games you have refreshed before playing. Thanks!