Well I had 4.0 on my device (iphone 3gs not the ipod) for about a week then i decided i needed a jailbreak so i downgraded to 3.1.3 with shsh blobs. When i opened cydia i noticed it said i had 4.0 shsh blobs. How is that possible? I never jailbroke 4.0 and i never used tinyumbrella or whatever it's called to back them up either. Is it possible that cydia just quickly grabbed the blobs right before it started restoring/downgrading?