Im on chrome, some games are ok , but some are not! Some sort of glitch, perhaps it is OK now, Ill try !
Problem with game analysis.

Strange. Sometime things happens and you may have to quit browers and restart ... or even reboot maschine. I hope it works out for you?

I am currently in two games, and have this problem in only one of them :
http://www.chess.com/echess/game?id=118497338
The analysis board on my iphone works fine, but this bug persists on two different computers (one is mac, one is linux, both using firefox). When I try chrome, the problem is still there. Also doesn't seem to matter if I'm logged in as me, or a guest.
Seems to be a server-side bug confined to _that particular game_.

Also, if I copy the FEN notation, and try to put it on an analysis board somewhere else, like a separate board on chess.com or analysis.cpuchess.com, it complains that it is not valid.
However, if I click on the "get PGN" link (from the analysis board page), the PGN file it downloads is valid, and I can open it in (e.g.) xboard.
So at least there's an alternative when one of these corrupt games pops up.
No try another browser?