I have been searching for months for help with this problem and am reaching out for any new answers.

I have an ipod touch 1g which was previously running OS3.1 jailbroken with no problems. I attempted to upgrade to OS 4.0 via iTunes (so i could then jailbreak it) but during the upgrade i got error 21. Now my ipod is stuck in restore mode.

Everytime I attempt to restore through iTunes I get error 21. I am stumped, all suggestions are appreciated. Thank you.