I have been jailbroken on 3.2.1 since I guess August of 2010, and decided it is finally time for me to update. I can't go any longer without multitasking on the iPad too. I downloaded the 4.2.1 update and then backed up my iPad, downloaded green poison, and when I went to try to update it keeps giving me an error. At first I got a 3004 error. Then I swapped from my Powermac G5 to my iMac, and both have the newest iTunes (tried before with 10.1 and then updated). Now it is saying something about not being eligible to update or restore.? Any suggestions?