I have the same problem when printing with Print Tool and the R3000, with Lion. Essentially the first inch or so at the bottom and top of a page of Pictorico can not be used because of the banding. I have used the same Print Tool with other Epson printers (7800, 3800 and 3880) and did not have this problem.
The only solution I have been able to come up with is to size the image so that the top 1.5" and bottom 1.5" is not used.