additional_import_paths with ruby 1.9.2

[polikin]

I don't know why, but additional_import_paths doesn't work since I updated Ruby to version 1.9.2. I also tried add_import_path. Same error. Any idea?

config.rb:
http_path = "/"

css_dir = "assets/styles"
sass_dir = "assets/styles/src"
images_dir = "assets/images"
fonts_dir = "../infoalertes/assets/fonts"

additional_import_paths = "../../charcoal/modules/admin/assets/styles/src/"

relative_assets = true

Sass debug

sass_options = {:debug_info => true}

---

compile error with Codekit:

Compass was unable to compile one or more files in the project:
error admin.screen.scss (Line 6: File to import not found or unreadable: _admin.base.
Load paths:
/Users/Locomotive/Documents/projets/locomotive/projects/trunk/www/modules/projects/assets/styles/src
/Library/Ruby/Gems/1.8/gems/compass-0.12.2/frameworks/blueprint/stylesheets
/Library/Ruby/Gems/1.8/gems/compass-0.12.2/frameworks/compass/stylesheets
Compass::SpriteImporter)
identical admin.screen.css

compile error with compass watch:

error assets/styles/src/admin.screen.scss (Line 6: File to import not found or unreadable: _admin.base.
Load paths:
/Users/Locomotive/Documents/projets/locomotive/projects/trunk/www/modules/projects/assets/styles/src
/Users/Locomotive/.rvm/gems/ruby-1.9.2-p320/gems/compass-0.12.2/frameworks/blueprint/stylesheets
/Users/Locomotive/.rvm/gems/ruby-1.9.2-p320/gems/compass-0.12.2/frameworks/compass/stylesheets
Compass::SpriteImporter)

---

ruby -v: ruby 1.9.2p320 (2012-04-20 revision 35421) [x86_64-darwin11.4.2]
compass -v: Compass 0.12.2 (Alnilam)
sass -v: Sass 3.2.10 (Media Mark)