I recently downgraded from 4.1 to 4.0 on my iPod Touch 2G MC Model. The strange thing is, I had never jailbroken before or saved my SHSH Blobs. This is what I did. First, I downloaded and launched TinyUmbrella with my iPod plugged in. I checked "Advance Options" and selected iPod2,1/4.0. I set it to Cydia and clicked "Save my SHSH". I can't use it since the TSS server won't start, so after it finished downloading and showed a message, I went into the hosts file and added the line to connect to Cydia. Then, when I went to restore, it actually worked! How did this actually succeed?