I've just upgraded my iphone 3G from 3.1.2 JB to 4.0 JB with pwnage 4.01. The 3.1.2 was JB'ed by blackrain and I used the blacksn0w unlock (not spirit). I used pwnage for the upgrade process. I also restored my settings (SMS, Contacts, music lib, apps, etc) but when I try to open Cydia, the app closes right after. I reset the phone but with no luck. Cydia still crashes. Is it that the phone is not correctly JB'ed? Is there a fix or do I have to restart the whole process?
A side note is that I choose the re-enable functionality option.