I just recently got a 20" iMac and connected my old printer (HP Photosmart 7550). I've noticed some issues in printing since connecting it. 1- Borders around 4x6 photos is about a 1/2" all around, even when printing borderless. 2- Print quality is no where even close to what it used to be when this printer was connected to a PC. (All 3 cartridges were just replaced.) Any ideas what the issues may be or any help would be greatly appreciated. Thanks!