Actually, changing the scale of a graph changes the number of samples included in any one pixel. Because the packet loss is a percentage, if the "pixels" surrounding your 100% packet loss have no packet loss (or less than 100% packet loss), then when you average these in (by doubling the number of samples in any one pixel), the packet loss percentage may change. This is really evident as you move from a small scale (say 30 minutes) up to a large scale (24 or 48 hours) - you'll see the packet loss pixels changing height during this time because of this averaging.<br><br>