I've been having the same problem now that i've set it up on 5 systems. for some reason one will always drop but the other 4 will remain connected leaving me with 1 clone that won't respond to anything. Not sure if there is a limite to the # of keyclones that can be chained together but i'm sure its some kinda of bug... Currently using 1.8h on all 5 machines. going to try 1.8i a bit later tonight see if that fixed things up.