Ticket #24622: If-Modified-Since_Bug.patch

wp-includes/class-wp.php

@@ -344 +344 @@
                                                 || !empty($this->query_vars['pagename'])
                                                 || !empty($this->query_vars['attachment'])
                                                 || !empty($this->query_vars['attachment_id'])
+                                                || ( !empty($this->query_vars['feed'])
+                                                        && in_array( $this->query_vars['feed'],
+                                                                array( 'comments-rss', 'comments-rss2', 'comments-atom' )
+                                                        )
+                                                )
                                         )
                                 )
                         )