I don't know if anyone else had trouble but when I downgraded from 4.3.5 back down to 4.3.3 I kept getting a 1013 error even with the TSS server running. As a last ditch effort I made a custom IPSW with the latest version of Sn0wbreeze and tried restoring to that and it worked! Using an iPhone 4 by the way.
Just make sure you have your SHSH file saved and this method should work for you, too!
Just make sure you have your SHSH file saved and this method should work for you, too!