Ok, so first off, I have a 2g mc model 8 gig ipod touch, and I don't know what I'm doing wrong. Last night I realized that I had a LOT of unnecessary jailbreak apps and regular app store apps, and me being the idiot that i am, I hit "clear all data" in settings. Big mistake. I had pressed it before I went to bed, and when I woke up it said to charge it, which I did, but it got stuck at the apple logo. So I fiddled around with it for a little bit, and realized that maybe pressing that wasn't such a good idea since it was jailbroken. So I downloaded iTunes (I use MediaMonkey to sync), and the damn thing won't let me load up the 3.1.2 firmware to my device. Now, I've tried itunes 9.2, 9.0, and 9.1 - none of which let me downgrade. They all give me a 1638 error once it gets to the "checking with apple" part of the restore progress. It lets me go to 4.0 just fine. And I've tried 3.1.3 as well, which didn't work either. Now, I really really hate ios4 because all I get on my device is google suggestions built into safari and folders and kills my capacity down to 6.6 gigs! I am 5000% positive that I downgraded with no errors 2 weeks ago, running on itunes 9.0.1 and ios4, but now I can't! I remember I hit the "save SHSH blobs" in cydia a few nights ago, but I doubt that they made it through when I nuked my ipod, and I'm not even sure what they are, so I'm not sure if that's related, but I thought I should put that in here. Could someone please tell me what I'm doing wrong?