The dev team is on the ball, as expected. I never upgraded to 2.2.1 because I did not want to bother with it. Note, QuickPwn has been updated to version 2.2.5-2 for the windows users. Remember QuickPwn and PwnageTool are not the same things.. so read up.

Here is the link

http://blog.iphone-dev.org/

Remember, normal rules apply, dont do this unless you know what your doing, and read the rules!!