iPod 4thGen worked great until software update 5.1, then sync issue began. Thought 5.1.1 would fix it, but I've gotten this error ever since. 4 hours of wait time while it attempts to restore - then same error. Deleted all Apple files from PC, tried again. After 4 hours, same error. Downloaded/installed iTunes on a different PC that never had it before, iPod need to be restored. 4 hours later, same error. When I posted my concern on Apple's Community - they deleted it because it was a 'rant'. What do they expect? Why don't they fix the problem rather than hide it by deleting posts. My $300 iPod is useless, and Apple is the cause. Sure, I'll wait for a fix, but I won't hold my breath.