I just had the odd experience of having the dice change on me in the middle of a move. This has happened to me on other sites, but not here. Probably a cache issue locally or on the server. It was disconcerting, though -- I saw double fours and after the first click, they changed to 5-1! Thought my mind was playing tricks and so I hit the back button, and there were the double fours again. However, the server insists I move the 5-1. Such is life :)