Bypass Passcode on jailbroken devices
with FW 3.1.x it was possible to bypass a passcode by deleting the keychain-2.db (or the entry in genp witch acct="DeviceLockPassword") and com.apple.springboard.plist on the device.
As far as I can see this is not longer working with iOS 4. If you delete keychain-2.db it is create automatically after a reboot and the passcode is still active. genp does not longer have a entry acct="DeviceLockPassword". There are two entries (passwords) in the automatically create keychain-2.db. One for the service "EnhancedVoicemail" and one for "PortableStorage".
Does anyone has more or detailled information about the changes with iOS 4?