Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 18637)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 18643)
@@ -179,5 +179,5 @@
         @Override
         protected boolean isCandidate(OsmPrimitive p) {
-            return p.hasKey("landuse") || p.hasTagDifferent("natural", "tree_row", "cliff");
+            return p.hasKey("landuse") || p.hasTagDifferent("natural", "arete", "cliff", "ridge", "tree_row");
         }
     }