I was having banding problems with my Epson 1280, too. I had printed a photo in JPEG format (on Super A3 heavy matte paper) and it was just fine. I converted it to a TIFF thinking I might get slightly better quality. Wrong! I had banding - blue lines across the paper, top to bottom. On a hunch, I changed the file back to a JPEG and the banding disappeared. I have NO idea why a TIFF file would cause banding. Anyone have a clue why a TIFF would come out this way? My problem is apparently solved, but I'm just curious.
This doesn't make a lot of sense to me, but