Were there lasers and sharks instead?
No Pieces

What operating system and browser/browser version are you using?
Windows XP and FireFox 3.6.13

If java's enabled in your browser and other java sites (such as those java test sites) work...maybe check if your anti-virus is blocking the chess pieces from being drawn, mistakenly identifying them as an attack.
Doesn't seem to. If I choose to play the computer I can see the pieces.

All fixed. Uninstalled Java and reinstalled. Thanks to those that answered.
You're welcome!
I have been trying to play my first game. I have the latest version of Java and was able to play th computer. When I start a game live with someone it shows the board but no pieces to move. What am I missing? Beisdes pieces that is.