Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 16403)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 16404)
@@ -577,7 +577,6 @@
 
         private boolean isObstacle(Way w) {
-            return w.hasKey("barrier", "waterway") || isBuilding(w);
-        }
-
+            return w.hasKey("barrier", "waterway") || isBuilding(w) || w.hasTag("man_made", "embankment", "dyke");
+        }
     }