Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 15529)
+++ trunk/data/validator/deprecated.mapcss	(revision 15530)
@@ -472,5 +472,7 @@
 }
 
-/* see #17950, #10661, #10837, #11737, #12771 */
+/* see #18334, #17950, #10661, #10837, #11737, #12771 */
+*[manhole=plain],
+*[manhole=unknown],
 *[police=yes],
 *[traffic_calming=yes],