rod03801: I doubt that it's that kind of isue. The problem with the images occurs after the missing move. Up until then everything's fine. That suggests that something on the server is getting confused. They have tooltips on the points to show how many pieces there are. A point with "b2" would have two black pieces. The tooltips for these of the dodgy images are things like "612", ie. no colour and way too many pieces. Also, the dodgy images are on points which don't have pieces, for instance the bearoff tray when the game is far from the bearoff stage.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)