Not sure about the specific model, but it seems to me like most of the newer color printers are now requiring you to keep ALL the cartridges full... or at least not empty. I've even heard of some circumstances, specifically HP, that I've heard of where the cartridge was just low, wouldn't print... the user replaced the cartridge, and back to printing..
Side note (but related):
I have historically been dead-set against "knock-off" inks for printers. However, recently, I thought I'd pick up some off-brand Epson inks for an Epson R260 I picked up last year. So far so good, though I'm only using one of the generics, so it's still hard to say... but it was MUCH MUCH cheaper than the brand-name stuff. If you go that route, just try to be as picky as possible, b/c there are plenty of bad ones out there..
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"If to err is human, then I must be some kind of human!" -Me