If you're trying to save your blobs to Cydias server click new. Not fetch.
Redsn0w will save your 6.1 blobs and submit them to Cydias server. First connect your new device and turn it on, then use redsn0w’s Extras->SHSH Blobs->New and point it at the 6.1 IPSW for your device.
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Most likely fixed the iPhone 4 bugs.
I don't like TinyUmbrella. I've tried backing up the blobs but it gives me:
CYDIA DOES NOT HAVE YOUR SHSH FOR iPhone5_World 6.0.2 (10A) THERE IS NO WAY FOR YOU TO GET THEM. SORRY. YOU ARE JUST TOO LATE.
Also, it's ***** up my internet & my iTunes.