iPTF members, I recently came across an article called "Everything You Wanted to Know About iPhone 3.1 But Were Afraid to Ask" on Wired.com. Like the headline for the article says, it explains mostly everything about 3.1, including information relevant to jailbreaking. Unfortunately, things don't look good for a 3.1 jailbreak. Hopefully there is a way around it, but without Cydia, there really is no jailbreak or any point to jailbreaking. The only way I can think of getting around this is if you just install Icy for the jailbreak, but not Cydia. EDIT: gunzmaiet brought up a good point that i didn't catch in the article (see the first comment of the thread). So it doesn't look like it will be affecting it at all. Mods, please delete this thread. There is no point in having it.