I've seen the question asked about six or seven separate times now, and yet not even one of them have been answered. It's crazy. Until there's a definite answer, I'd steer clear of this root method required for stock gingerbread from AT&T.
well i rooted my phone a few days ago. it seems to work fine. i was able to dowbload battery calibration app.(although it didnt seem to improve anything whatsoever) but like one person said earlier in this post that root clears when u do factory reset, NO it does not.
Actually one time I factory reset while rooted and I lost the root. But my phone ran perfectly fine when returning to stock. Shortly after that I fudged up again and factoryreset and I kept root. But that's all I've been able to find for an answer.