Right, you'll tell me, they make printers, what was I expecting? Well, I stumbled on this only today: I can't print a black/white-only document using my Lexmark S600 if the colour cartridges are low. There is no technical justification for this. Black/white printers have been printing black/white documents for many years without needing colour cartridges. A Lexmark S600 could do the same. But Lexmark clearly cares less about you than about its bank account.
I'd love to say, never buy a Lexmark again, but I don't know of another manufacturer that's less crappy. Suggestions welcome.