Over the past several months, I have had the yellow cartridge "not registered" . . . which if I pull out and wipe with a cloth, and return, then all is good. I've replaced the Yellow cartridge with same results. And when I do wipe it, there seems to be a bit of ink that is on the cloth.
Otherwise, it still prints great. This includes all the Inkjet Mall refillable cartridges for this R3000.
Location: Portland Oregon