iOS4.0 & iTunes 9.2 has some buggy!!

iTunes 9.2 has some buggy!!

I update iOS 4.0 with iTunes 9.2.

But, theme is suck caused by jailbreak.

So I decide to reinstall firmware for having mandatory theme style.

But, it failed reinstalling firmware several times even Restore only, not dfu.

So I try to install firmware again in itunes 9.1.1.

Then, restore backup from iTunes 9.2 which is before Jailbreak.

Yea, it's working.