Ruby on Rails

Hey all

After upgrading to Rails 3, when I try to run Rails 2 app, I get this:

script/server
Missing the Rails 2.3.8 gem. Please `gem install -v=2.3.8 rails`, update
your RAILS_GEM_VERSION setting in config/environment.rb for the Rails
version you do have installed, or comment out RAILS_GEM_VERSION to use
the latest version installed.
MacBook-Pro:MK JANUARY jmerlino$ rails -v
Rails 3.0.3

So I assume there's going to be several issues like this.

According to the railscasts, he says use the rails_upgrade plugin to
address these issues.

Anyone agrees with this?

Thanks for response.

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