I now have the push on connector that Adam had. When I reprogrammed his, he provided a 6-10 pin adapter that allowed the 10-pin plug to plug into the Pololu 6-pin plug and it worked fine. Ever since, I've not managed to get the push on connector method to work. It either would not recognise that there was an ESC connected or, more recently, would cause the ESC to go up in smoke :P (not sure if that was the direct reason)