jhawkkw
Chinchillin'
Taken right from XDA:
Well guys, I have very unfortunate news for those of you whom updated and wanted to get root again. It is no longer possible. The new locked bootloader in the update prevents your from flashing the prerelease kernel and even prevents you from downgrading the bootloader itself or flashing back to VRUAMDK build so then you could flash the prerelease kernel. At this point anyone who updated is sort of "screwed" (as they say), including my own device. Unfortunatly until someone is able to find a new exploit we are seriously in trouble here as I don't have the knowledge to work on that level.