Rails - Aug 2006 - Freezing after Upgrade?

I''m upgrading our production server from 1.1.2 to 1.1.5.  The 
instructions say:

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As always, the trick is to do ?gem install rails? and then either 
changing config/environment.rb, if you?re bound to gems, or do ?rake 
rails:freeze:gems? if you?re freezing gems in vendor.
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I''ve done the "gem install rails" already and it''s
been updated but do I
need to freeze the gems or anything?  Is any modification needed in the 
project directory itself to make sure we''re safe and secure?

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