Ive only noticed the high stales (false submits?) for bitclockers, so I highly doubt its the hopper at fault since the whole lot of other sites would have had similar instances.
I've suspected this is the issues causing the higher than normal stale rate across the board. I'm getting 2-4% stales on every site, and I've noticed that the vast majority come when the proxy switches pools. I think it is more pronounced for bitclockers because of his anti-hopping tactics, which I assume are to blame for the connection issues I was complaining about earlier. So, when I would lag out, move away then move back, the shares being submitted were probably for the last pool