rails 2.3 config.load_paths in development mode

Question

I moved some files into subfolders within my app/models directory and added those directories in the config.load_paths in config/environment.rb:

config.load_paths += Dir["#{Rails.root}/app/models/extras"]

within app/models/extras I've got a few ActiveRecord models, for instance say:

app/models/extras/blog_post.rb

class BlogPost < ActiveRecord::Base
  has_many :comments
end

app/models/extras/comment.rb

class Comment < ActiveRecord::Base
  belongs_to :blog_post
end

Now when I call a page (ie. /blog_posts/) where only BlogPosts are shown (without loading the comments association) everything works fine But if I call a page (ie. /blog_posts/1) where the comments are included in the queries (like, BlogPost.find(1, :include => :comments), I get the following error:

Expected .../app/models/extras/comment.rb to define Extras::Comment

Now everything works fine in production mode, but not in development.. Anyone has a fix or a solution for this?