OK, I used sn0wbreeze to get my iPhone 4 to 4.2.7 with no problems. Today I used sn0wbreeze again to make a 4.2.8 package. But I cannot get it on the iPhone. I have TinyUmbrella running with the blobs saved. I am getting error 1600. I have restarted, used different cable, even tried my MacBook. I am in DFU mode according to TinyUmbrella. So I figured must be a bad 4.2.8 package. But now I cannot get it to 4.2.7 doing the same thing (error 1600), TinyUmbrella server running and my host is edited to show 127.0.0.1 gs.apple.com. Any ideas what I am doing wrong? More info, I have edited my host file to point to Cydia, where my blobs are stored and am trying without running Tiny Umbrella. I get an error saying server cannot be contacted.