My game (http://lichess.org/poxzeq70) started before the big lichess upgrade on April 28. It was my friend's move. After the big upgrade, my friend has twice thought he's made a move, only to have
the game revert to the pre-April 28 game state. I'm inferring this from the two emails he sent me, letting me know that it was my move. In the second he said "sorry i thought i had sent the move, but
it should be really sent now". It's still his move (or his move again). Would it be simplest to end the game? Or would it be a useful corner case for code testing? I'll further test with a reserve
game (http://lichess.org/fhrak8ek) that was also started before April 28 (it was my move; now hopefully his move).