diff --git a/lib/compass/app_integration/rails.rb b/lib/compass/app_integration/rails.rb
index 745efca5..668fbd42 100644
--- a/lib/compass/app_integration/rails.rb
+++ b/lib/compass/app_integration/rails.rb
@@ -16,7 +16,7 @@ module Compass
       end
 
       def configuration
-        Compass::Configuration::Data.new.
+        Compass::Configuration::Data.new('rails').
           extend(ConfigurationDefaults)
       end
 
diff --git a/lib/compass/app_integration/rails/installer.rb b/lib/compass/app_integration/rails/installer.rb
index ece81ea2..4b06a2a7 100644
--- a/lib/compass/app_integration/rails/installer.rb
+++ b/lib/compass/app_integration/rails/installer.rb
@@ -10,10 +10,6 @@ module Compass
     module Rails    
       class Installer < Compass::Installers::ManifestInstaller
 
-        def default_configuration
-          Compass::Configuration::Data.new.extend(ConfigurationDefaults)
-        end
-
         def completed_configuration
           config = {}
           config[:sass_dir] = prompt_sass_dir unless sass_dir_without_default
diff --git a/lib/compass/app_integration/stand_alone.rb b/lib/compass/app_integration/stand_alone.rb
index c3a6c9fe..2a00d195 100644
--- a/lib/compass/app_integration/stand_alone.rb
+++ b/lib/compass/app_integration/stand_alone.rb
@@ -13,7 +13,7 @@ module Compass
       end
 
       def configuration
-        Compass::Configuration::Data.new.
+        Compass::Configuration::Data.new('stand_alone').
           extend(ConfigurationDefaults)
       end
 
diff --git a/lib/compass/app_integration/stand_alone/installer.rb b/lib/compass/app_integration/stand_alone/installer.rb
index d13d6162..84dc19dc 100644
--- a/lib/compass/app_integration/stand_alone/installer.rb
+++ b/lib/compass/app_integration/stand_alone/installer.rb
@@ -35,10 +35,6 @@ module Compass
           write_configuration_files unless config_files_exist? || !@manifest.generate_config?
         end
 
-        def default_configuration
-          Compass::Configuration::Data.new.extend(Compass::AppIntegration::StandAlone::ConfigurationDefaults)
-        end
-
         def completed_configuration
           nil
         end
diff --git a/lib/compass/commands/generate_grid_background.rb b/lib/compass/commands/generate_grid_background.rb
index 06c2bc58..2bd16d9a 100644
--- a/lib/compass/commands/generate_grid_background.rb
+++ b/lib/compass/commands/generate_grid_background.rb
@@ -66,7 +66,7 @@ Options:
       def initialize(working_path, options)
         super
         assert_project_directory_exists!
-        Compass.add_configuration(options)
+        Compass.add_configuration(options, 'command_line')
       end
 
       def perform
diff --git a/lib/compass/commands/installer_command.rb b/lib/compass/commands/installer_command.rb
index 62dc87d2..138296f8 100644
--- a/lib/compass/commands/installer_command.rb
+++ b/lib/compass/commands/installer_command.rb
@@ -8,8 +8,8 @@ module Compass
       def configure!
         Compass.add_configuration(options[:project_type] || :stand_alone)
         Compass.add_project_configuration unless respond_to?(:is_project_creation?) && is_project_creation?
-        Compass.add_configuration(options)
-        Compass.add_configuration(installer.completed_configuration)
+        Compass.add_configuration(options, 'command_line')
+        Compass.add_configuration(installer.completed_configuration, 'installer')
         if File.exists?(Compass.configuration.extensions_path)
           Compass::Frameworks.discover(Compass.configuration.extensions_path)
         end
diff --git a/lib/compass/commands/write_configuration.rb b/lib/compass/commands/write_configuration.rb
index c4e847dd..acf60301 100644
--- a/lib/compass/commands/write_configuration.rb
+++ b/lib/compass/commands/write_configuration.rb
@@ -41,6 +41,14 @@ module Compass
 
       def perform
         if options[:debug]
+          puts "Configuration sources:"
+          c = Compass.configuration
+          while c
+            print c.name
+            c = c.inherited_data
+            print ", " if c
+          end
+          print "\n"
           Compass.configuration.debug.each do |prop, values|
             if options[:debug].is_a?(Symbol)
               next unless prop == options[:debug]
diff --git a/lib/compass/configuration/data.rb b/lib/compass/configuration/data.rb
index 755ccfd1..42936045 100644
--- a/lib/compass/configuration/data.rb
+++ b/lib/compass/configuration/data.rb
@@ -18,6 +18,7 @@ module Compass
     class Data
 
       attr_accessor :required_libraries
+      attr_reader :name
 
       include Compass::Configuration::Inheritance
       include Compass::Configuration::Serialization
@@ -25,7 +26,9 @@ module Compass
 
       inherited_accessor *ATTRIBUTES
 
-      def initialize(attr_hash = nil)
+      def initialize(name, attr_hash = nil)
+        raise "I need a name!" unless name
+        @name = name
         self.required_libraries = []
         set_all(attr_hash) if attr_hash
         self.top_level = self
@@ -100,4 +103,4 @@ module Compass
 
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/compass/configuration/helpers.rb b/lib/compass/configuration/helpers.rb
index ec454d80..b2e0e396 100644
--- a/lib/compass/configuration/helpers.rb
+++ b/lib/compass/configuration/helpers.rb
@@ -11,14 +11,17 @@ module Compass
       end
 
       def default_configuration
-        Data.new.extend(Defaults).extend(Comments)
+        Data.new('defaults').extend(Defaults).extend(Comments)
       end
 
       def add_configuration(config, filename = nil)
         return if config.nil?
 
+
         data = configuration_for(config, filename)
 
+        # puts "New configuration: #{data.name}"
+        # puts caller.join("\n")
         data.inherit_from!(configuration)
         data.on_top!
         @configuration = data
@@ -30,7 +33,7 @@ module Compass
         elsif config.respond_to?(:read)
           Compass::Configuration::Data.new_from_string(config.read, filename)
         elsif config.is_a?(Hash)
-          Compass::Configuration::Data.new(config)
+          Compass::Configuration::Data.new(filename, config)
         elsif config.is_a?(String)
           Compass::Configuration::Data.new_from_file(config)
         elsif config.is_a?(Symbol)
@@ -67,7 +70,7 @@ module Compass
         configuration_file_path ||= detect_configuration_file
         if configuration_file_path
 
-          data = configuration_for(configuration_file_path) 
+          data = configuration_for(configuration_file_path)
 
           if data.raw_project_type
             add_configuration(data.raw_project_type.to_sym)
diff --git a/lib/compass/configuration/serialization.rb b/lib/compass/configuration/serialization.rb
index 4d8af6c0..829e3bb6 100644
--- a/lib/compass/configuration/serialization.rb
+++ b/lib/compass/configuration/serialization.rb
@@ -9,13 +9,13 @@ module Compass
 
       module ClassMethods
         def new_from_file(config_file)
-          data = Data.new
+          data = Data.new(config_file)
           data.parse(config_file)
           data
         end
 
         def new_from_string(contents, filename)
-          data = Data.new
+          data = Data.new(filename)
           data.parse_string(contents, filename)
           data
         end
diff --git a/lib/compass/installers/bare_installer.rb b/lib/compass/installers/bare_installer.rb
index 049f7206..96b017d3 100644
--- a/lib/compass/installers/bare_installer.rb
+++ b/lib/compass/installers/bare_installer.rb
@@ -2,10 +2,6 @@ module Compass
   module Installers
 
     class BareInstaller < Base
-      def default_configuration
-        Compass::Configuration::Data.new.extend(Compass::AppIntegration::StandAlone::ConfigurationDefaults)
-      end
-
       def completed_configuration
         nil
       end