title: will "gem update --system" update rails from 2.3.8 to 3.0?
body: <p>If'n I had a 2nd computer I would just do it and see - but I've finely tuned this thing to not run 3.0 just yet ... don't want to muck it up. Took hours &amp; hours to get here. Bascially - I want to keep rails at 2.3.8 for a while ... so will</p>
  
  <blockquote>
    <p>gem update --system</p>
  </blockquote>
  
  <p>update rails from version 2 -> 3? I did read the docs with no clear answer and am guessing it will, but hey, might learn something new.
  Otherwise I update each one (of the 8 - 1) gems that I have.
  thanks...</p>