It is lag and it happens to me every single day even though I have Firefox installed. Live Chess is in Beta so don't forget that! It is still under construction and the lag problem hasn't yet been resolved.
Cheating or lag?
Its not cheating. I get accused of cheating nearly every time i use live chess. (have you people no manners? You know who you are....) . I have no idea how to cheat, or use what ever programme you are talking about, on live chess, or any chess. I do use the pre move function to great effect and this can cause some upsets. But lag is an issue too i guess....
Playing QUARTERMASTER. Q had 19 sec left, I had 2 min. My screen goes blank. Q got the win. I never lost internet connection. Is this a persistent problem for this web site?