I recently downgraded my iPod Touch 4th generation with saved SHSH blobs using tiny umbrella. Now when I try to update using itunes, I cannot! Ive tried iReb and making custom ISPW's but its not working! How can I start updating like a normal iPod after ive used my SHSH Blobs to downgrade! I am at ios 4.1 and I want to update to 5.0.1 I do not have any saved SHSH for 5.0.1! HELP PLEASE!