Before I picked up the Simply Rails book, I had been messing around with rails. I updated to rails 2.3 just for kicks, but now want to revert to 2.2 since v2 it is what the book is using.
I had installed rails and a few other things without 'sudo', so they ended up being located in a different place in my case it was /Users/<username>/.gem/ruby/1.8
Apparently simply doing an update or uninstall did not access that directory, so what I had to do was find out where it was located:
%gem list -d rails
>>/Users/<username>/.gem/ruby/1.8
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