I was playing and noticed that keyclone was still running but it was not passing any of my commands to the other 4 windows. All this is on 1 PC dual core 3.4ghz 4 gigs of ram dual 8800gtx.
I had to close keyclone and relaunch it add each window and it would work again. About 20-30 min later it would stop working again.
(note)the little circle in keyclone to let you know its getting commands was still working each time I hit a key that circle would move to a new dot but the command was not hitting the other 4 windows.
I noticed this with G and H versions.