Okay this problem is actually very serious. I've tried pretty much EVERYTHING to try and fix it. My iPod pretty much won't sync with my desktop computer. I've reset the settings and erased all media, I've restarted, reinstalled iTunes. I even reformatted my computer! It started out by saying the disk could not be found and that it could not by synced. Then I tried upgrading to 2.2 but it got an error message, I think 9. So I tried to roll back to version 2.1 but with error 6 I believe. I couldn't go back to 1.1.5 or 4 either. I upgraded to 2.2 on my dad's laptop and it worked. I don't understand. It might be a problem with my USB ports? But I've tried all 6 of them and it doesn't work with any of them. I've never had this problem before. So I'm pretty close to sending it back to best buy where I bought it. So right now it's got 2.2 installed on it but I'm unable to put any songs onto it from my desktop. I dont know if it's the computer or the iPod. or a combination of the 2. I've also put it into recovery mode while trying to restore / upgrade. Doesn't work. Any help within the next day or two would be GREATLY apreciated.