So I DL'd Absinthe and Tiny Umbrella and I'm about to start the process JBing 5.1.1 on a 4s. My first question is what do these warnings in TU mean (see pics) As I understand if I back up the SHSH files than I CAN'T Brick the phone. Is this true? If I decide/or need to restore the phone to factory settings, i.e. warranty thru Apple, will there be any trace that it was JB'ed? Also what else do I need to watch out for. I'm using a MBP running ML. Any help is appreciated.