Topic: Blueprint and asset pipeline

I'm having trouble implementing blueprint css in my project.  My understanding of the way the asset pipeline works is that I should just be able to drop blueprint directory into my vendor/assets/stylesheets folder.  This would then get picked up in the application.css file with the require_tree . directive.

But this doesn't appear to be working like this.  I've seen other posts where people are adding stylesheet_link_tag to the layout, or a specific require_directory ./blueprint, but i wouldn't think that would be necessary if you have the require_tree in application.css.  Is this not correct?