Model generator doesn't properly check for class collisions

If I build a model named 'Config', things break. The model generator
is supposed to prevent name collisions like this (class_collisions in
lib/rails_generator/commands.rb) but for some reason it's never
checking for collisions with Config, only with ConfigTest.

Note: the rspec_model generator does properly fail with a collision in
this case.

This is on Rails 2.3.4. To reproduce:
script/generate scaffold config name:string

Then try to view /configs in the browser:

NoMethodError in ConfigsController#index

undefined method `all' for Config:Module

This is on Rails 2.3.4. To reproduce:
script/generate scaffold config name:string

Then try to view /configs in the browser:

NoMethodError in ConfigsController#index

undefined method `all' for Config:Module

Are you able to reproduce this on master? Both the generators and the
collision detection have been heavily enhanced and it looks like
that'll catch them here?