Ok, so... I googled every solution I could find to downgrade back to iOS 4.3.3. I tried them all. I used the option+restore method, tried the TinyUmbrella trick, downgraded iTunes to 10.3, NONE of which worked. I spent hours trying to find a fix for this. I kept getting the iTunes unknown error (1) message. I made sure I was in DFU mode every single time. Hell, I even tried xCode, which failed while updating the baseband. I was a rare case that couldn't be fixed easily. What I did: Downloaded pwnage tool. Clicked on DFU and then let it search for the 4.3.3 ipsw. I then created a custom firmware bundle. It was able to be restored. That's the only thing I was able to do. The second I tried the default downgrade method using a restore, my phone would NOT get out of restore mode. Maybe some of you unlucky ones out there like me could benefit from this. I use my phone for work and lost a lot of sleep last night!