My iPad is on 4.3.1 and I want to update it to 4.3.3, which Apple is no longer signing, I have changed my hosts file so it talks to Saurik's server, I know its right as when I type, gs.apple.com in my browser it goes to Cydia, but I still get an iTunes Error 3194.
If you have not been on 4.3.3 before then you won't have the blobs saved.....and if you don't have the 4.3.3 blobs saved then you can't upgrade to 4.3.3 so it's stay on the version that you are on or go straight to 4.3.5
Also, blobs can only be saved for the current firmware that apple is signing. Even if your device is on 4.3.3 you will not be able to save blobs for that firmware, only 4.3.5.