Quote Originally Posted by StoneNYC View Post
I know it's solved but this is specifically the Digital ICE feature being left on, just to confirm, it won't happen as long as you have Digital ICE turned off / unchecked
On this scanner, a HP Scanjet 4850, it has dust removal (but not ICE) - even with this turned off it still produces the effect (albeit less so) - whereas Vuescan on the same scanner does not. I can't say that I'm impressed with HP.