I now have a new phone running 4.3.3, with no SHSH blobs saved. For users in my situation who will NOT have the option to restore to 4.3.3 should something go awry, could some of you recommend what jailbreak tweaks to absolutely stay away from? For instance, I'm terrified to mess with Winterboard or any themes. I'm reluctant to do the "commcenter hack" to hide my tethering. I can't see how cosmetic plist changes could cause any problems, but I'm reluctant to go there either. I even want to limit shutdowns from the battery dying, to just prevent a boot loop, however unlikely that would be. What would YOU not do if you were terrified of having to restore your iPhone?