Sorry if this issue has been posted elsewhere, I couldn't find it though. I SBF'd from Gingerbread .591 back to Stock .340 and for the life of me couldn't get Z4 Root to root my phone. I did a factory reset before and after the SBF'ing which didn't do a thing. After what seemed like a hundred different scenarios that I tried, I finally gave Gingerbreak a go and what do you know? It worked. Is it because of the 30.04 bootloader?