Today (12/11/11) I made my first attempt at Jailbreaking. I have an AT2 and an old MacMini 1.66 Mhz with 1 Gig of ram and Mac OS 10.6.8. My iTunes is 10.5.1. I keep getting error 1600. I've tried a number of times already. Is this a known software defect? I'm really interested in moving forward with the aTV flash.