Today when I went into my waiting games.  No pieces displayed on the board. 

I use Ubuntu 8.04 (and love it), Firefox 3.0.7. 

Anyways I can't think of anything I've done to change my system and no other web pages are obviously acting up. 

Am I alone or has anyone else had this issue?

This happens for me pretty often. Useally they come up if you wait, but sometimes you have to refresh the page.

Well after much ado.  I decided to clear my cache and clean all my personal data and the pieces were back next time I reloaded the page.

Guess it was just me.

I think your solution is to click the mouse outside the board.

Tried that, even tried the old tried-and-true (windows trick) of shutting down and restarting, but that still didn't work. I logged out and back in.  Refreshed numerous times.  Exited Firefox etc.  Nothing was working.

Clearing the cache, seemed to do it.