I received week49 iphone with 1.1.2 firmware OTB.. I downgraded to 1.1.1 and jailbroke it according to the guide here, but on the last step I had problem. After I upgraded to 1.1.2 again and when I started jailbreak.jar..a small window opens and say that "uploading installer..." but there is no progress..I waited for more than 2 hours but no progression. I tried this several times only to fail. Please help me what to do..