Index: wp-admin/includes/media.php
===================================================================
--- wp-admin/includes/media.php	(revision 18462)
+++ wp-admin/includes/media.php	(working copy)
@@ -1858,7 +1858,7 @@
 		<select id="orderby" name="orderby">
 			<option value="menu_order" selected="selected"><?php _e('Menu order'); ?></option>
 			<option value="title"><?php _e('Title'); ?></option>
-			<option value="ID"><?php _e('Date/Time'); ?></option>
+			<option value="post_date"><?php _e('Date/Time'); ?></option>
 			<option value="rand"><?php _e('Random'); ?></option>
 		</select>
 	</td>