I rooted my phone and then an update unrooted it. I described my story here . I am glad that the update unrooted it, I was also planning on doing it myself.
What can I do to make sure that all traces of me having root access on the phone are erased? I'd like to do this, so that if I have to go in for warranty purposes, I don't have any problems.
I'm guessing uninstalling z4root would be the first step. What else?