This morning I was in the process of backing up my iPad and had already downloaded 4.2.1 so I could use the greenpoison jail break. The backup took a long time and when I went to click update, iTunes showed version 4.3 had been released and is now asking me to update to 4.3. Do I need to now wait for a jailbreak 4.3 or is there some way to still install 4.2.1 to do the jailbreak. Thanks