I just got my iPhone 3GS 8GB replaced at the Apple store. I immediately jailbroke when I got home. I noticed that cydia reports that there are SHSH blobs stored for iOS 4.2.1 and 4.3b1. Does that mean that the person who previously had this phone (assuming it is a refurb) was a dev who got iOS 4.3b1 on it and then jailbroke? Screenshot to follow, sorry I am syncing apps to my iPhone.