Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.611.2.7
diff -u -r1.611.2.7 common.inc
--- includes/common.inc	3 Jul 2007 20:13:23 -0000	1.611.2.7
+++ includes/common.inc	15 Jul 2007 18:49:59 -0000
@@ -1501,6 +1501,10 @@
 function drupal_build_css_cache($types, $filename) {
   $data = '';
 
+  $file_header  = "/**\n";
+  $file_header .= " * The below content is aggregated from the following files.\n";
+  $file_header .= " * For licensing information please look in the original files.\n *\n";
+
   // Create the css/ within the files folder.
   $csspath = file_create_path('css');
   file_check_directory($csspath, FILE_CREATE_DIRECTORY);
@@ -1517,6 +1521,8 @@
           $contents = preg_replace('/@import\s+(?!url)[\'"]?(\S*)\b[\'"]?/i', '@import url("\1")', $contents);
           // Fix all paths within this CSS file, ignoring absolute paths.
           $data .= preg_replace('/url\(([\'"]?)(?![a-z]+:)/i', 'url(\1'. $path . '\2', $contents);
+          // Add the url to the aggregated file.
+          $file_header .= ' * '. $GLOBALS['base_url'] .'/'. $file ."\n";
         }
       }
     }
@@ -1534,8 +1540,11 @@
       [\n\r]                        # Remove line breaks.
       >x', '\1', $data);
 
+    // Close the comment that list the aggregated files.
+    $file_header .= " */\n";
+
     // Create the CSS file.
-    file_save_data($data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);
+    file_save_data($file_header . $data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);
   }
   return $csspath .'/'. $filename;
 }