I'm getting white dots on the printer output from a Dell 3000cn printer. As a test, today I printed four pages, each with a large colored rectangle in black, red, blue and yellow colors. The red and the blue rectangles had the dots; the black and the yellow ones did not. These are faint white dots 1/2 to 2 inches apart in a somewhat regular pattern. The black cartridge is at the 25% level and the others are between 60 and 80%.