Index: wp-admin/options-media.php
===================================================================
--- wp-admin/options-media.php  (revision 19601)
+++ wp-admin/options-media.php  (working copy)
@@ -129,7 +129,7 @@
 <tr valign="top">
 <th scope="row"><label for="upload_url_path"><?php _e('Full URL path to files'); ?></label></th>
 <td><input name="upload_url_path" type="text" id="upload_url_path" value="<?php echo esc_attr( get_option('upload_url_path')); ?>" class="regular-text code" />
-<span class="description"><?php _e('Configuring this is optional. By default, it should be blank.'); ?></span>
+<span class="description"><?php _e('Optional, unless using an absolute path above. By default, it should be blank.'); ?></span>
 </td>
 </tr>