Originally posted by KewpieThanks, it seems to have corrected itself. It was showing yellow and the black bishop taken but the" submit move" box was showing and wouldn't respond.
I've just dragged up the game history board and repeated the last few moves. The history is correct and uncorrupted and it is your opponent's move now. On your MyGames page it should appear with a yellow "Waiting" to indicate that fact.
A completed, submitted move shows as yellow while it is your opponent's turn to move.