Hi I have finally decided to jailbreak my iPod Touch 3G due to the endless possibilities of customisation after browsing through the forums. However, before I "make it ra1n", there has always been a question that kept me from jailbreaking in the first place. Let's say I jailbreak with Blackra1n version x today. He,astoundingly, releases an untethered version xx, the following day. Do I need to restore my device to factory settings before upgrading to the new version of Blackra1n or using any other jailbreaking software (redsn0w)? In other words, will I be required to ever restore my device for better, more stable, future jailbreak updates? Thanks.