I'm really starting to wonder how these shsh blobs get backed up. I got 4.0 blobs when I updated before any jailbreak was available (3GS new bootrom) then a downgrade to 3.1.3 plus jailbreak said I have 4.0 and 3.1.3 blobs. Now I just downloaded 4.0.1 (not installed yet just downloaded from iTunes) and my iphone says 3.1.3, 4.0, and 4.0.1 blobs backed up. How? The device I'm talking about is a 3GS (new bootrom) not the listed 2g ipod I have.