Pete, I think you might be right on the latter part. Since I've started using MultiPing and saw the "Packet loss" I've tried to do some preventive work by reporting this to our ISP. However they can't seen any errors most of the times. So I think that it might be related to what you've said about the router configuration and hence no problems has been reported by our customer.

But I'll see if I can narrow it down further and get back to you if there should be any difference in the two programs.

Thanks again!