Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.756.2.50
diff -u -p -r1.756.2.50 common.inc
--- includes/common.inc	30 Apr 2009 00:39:01 -0000	1.756.2.50
+++ includes/common.inc	2 May 2009 23:09:23 -0000
@@ -1677,8 +1677,14 @@ function drupal_get_path($type, $name) {
 }
 
 /**
- * Returns the base URL path of the Drupal installation.
- * At the very least, this will always default to /.
+ * Return the base URL path (i.e., directory) of the Drupal installation.
+ *
+ * base_path() prefixes and suffixes a "/" onto the returned path if the path is 
+ * not empty. At the very least, this will return "/".
+ *
+ * Examples:
+ * - http://example.com returns "/" because the path is empty.
+ * - http://example.com/drupal/folder returns "/drupal/folder/".
  */
 function base_path() {
   return $GLOBALS['base_path'];