I had a HP Photosmart printer last year and it's cartridges were failing to print. It was admitted by tech support that the initial cartridges that come with the printer have less ink than regular ones bought in the store. Hmm. I thought I was buying the same thing that came with them? They look the same? Is Lexmark doing this trick too? I just got a new set of cartridges from them and printer head since mine was failing to print. In a very short time I was out of black ink. Did they offer the print head and a set of half full cartridges to satisfy me, so I would not feel bad by throwing away my full cartridges I just bought? I wonder!!