Change from 3.0.6 => Rails 3.0.7 "no such file to load -- action_mailer/railtie"

In my application.rb, I have this:

#require “rails/all”

require “action_controller/railtie”

require “action_mailer/railtie”

require “active_resource/railtie”

require “active_model/railtie”

(I didn’t want ActiveRecord) This worked fine up to 3.0.6, but now fails with:

/Users/jeffdeville/Documents/code/ruby/wg/config/application.rb:6:in `require’: no such file to load – action_mailer/railtie (LoadError)

from /Users/jeffdeville/Documents/code/ruby/wg/config/application.rb:6:in `<top (required)>'

from /Users/jeffdeville/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/commands.rb:28:in `require'

from /Users/jeffdeville/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/commands.rb:28:in `block in <top (required)>'

from /Users/jeffdeville/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'

from /Users/jeffdeville/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/commands.rb:27:in `<top (required)>'

from script/rails:6:in `require'

from script/rails:6:in `<main>'

Suggestions please?