I've benn trying forever to get this to work. I have an HP 1600 All-in-one printer that works fine. I get a photo in iPhoto, and click print. I select under advanced: Borderless, zoom 100%, 4x6 photo paper, no tabs. then i click preview and there is 1/4 inch of white space on the top, bottom and sides. This has to be a problem with iPhoto because I can use the HP print app. to print a 4x6 fine, borderless and it takes up all the paper, how come iPhoto dosn't do this?