Oh yeah, if the printer tells you it's an inkjet capable of, say, 600 dpi, don't confuse this with the required dpi of your file. The printer dpi represents how accurate the printer can spray inkdots on the paper...but many inkdots are used to make a single pixel of accurate colour..therefore, your image dpi (in fact, correctly called ppi...pixels per inch...you will see this if you use Photoshop) will be less than the printer dpi.