Ticket #18086: 18086.patch

wp-includes/canonical.php

@@ -280 +280 @@
                                 unset( $_parsed_query['name'] );
                 }
 
+                $_parsed_query = array_map( 'urlencode', $_parsed_query );
                 $redirect_url = add_query_arg( $_parsed_query, $redirect_url );
         }