I have been using an HP DeskJet 1220C printer with my G4 PowerBook running OS 10.2.8 without trouble for months. Recently, it began printing every other line in bold print for standard B&W text documents, and I can't find any solution searching the HP website to explain the problem. Incidentally, the yellow color printhead also stopped working at the same time. Is anyone familiar with the cause of this problem? Could it be related to the problem with the yellow print? Thank you very much for your help.