Yes, perhaps you are correct...maybe the guy didn't know what he was doing. BUT... a thought just ocurred to me...Maybe, just maybe the problem lies in the fact that the sensor remains charged at all times when the cam is powered up? If I recall correctly, all that happens is the mirror locks up to allow for access to the sensor. If the sensor remains charged during lock up, it will happily attract all the dust it can. Again, just a thought... Anyway, great discussion...and, I can understand (and live with) dust maintenance but still my disappointment with 5 brand new D70's remains....

In youth, we learn....with age, we understand.