I'm sorry about this. I'll make sure I pass this on to our technical staff so we can get this issue resolved.
Live chess bug?

If you come up with this error again and happen to be using Firefox, I would appreciate that you go to Tools->Error Console, click on the "Errors" tool bar option (to show only the critical errors) and then try to copy/paste the **LAST** error information here. If you right-click the error it shows you an option to "Copy" it so you can paste it here.
If you want to be even nicier, you can copy/paste the last 3 or 4 errors. If you look at the link that comes below the error, you should be able to identify which of these errors bolong to chess.com (i.e begin with http://www.chess.com) and discard errors from other sites.
Thanks!
Hi, everyone.
http://www.chess.com/livechess/game.html?id=2818204
In the game above I premoved a promotion, but instead of the promotion, nothing happened and the game froze. I wasn't able to make any other moves, and had to sit there and let it time out in a totally won position. I'm using Firefox v3.5.5.