Hello, i had my iPad 2 Wifi only jailbroken at 4.3.3(so SHSH blobs are saved) when it began looping at the apple boot logo. Since i had no SSH installed, the only way out was to reinstall 4.3.3, which didn't work because of error 1600 or 1604. I needed to access an important file in an app so i installed 4.3.4. Now i would like to downgrade back to 4.3.3 but still the 1600 errors appear. (I'm using TinyUmbrella and my Ipad2 in DFU mode) I tried everything, changing USB port, reinstalling Itunes, using 2 other computers, but nothing works. The only programm adressing this error1600-issue is iREB RC4, but sadly it doesn't support the iPad 2. Any suggestions?