I've just recently tried printing photos from iPhoto. I have a Powerbook G4, Canon Powershot G3, and and Canon i950 printer. When printing 4x6 borderless photos I get white bars down the sides of the photo. It's as if the the picture information does not take up the entire available paper. The photo paper is obviously 4x6 but it seems that the actual photos are in a 4:3 ratio. Kind of like watching regular broadcast TV programs on a widescreen TV. What am I doing wrong or not doing? Help!