Index: /trunk/src/org/openstreetmap/josm/data/validation/tests/DuplicateNode.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/validation/tests/DuplicateNode.java	(revision 5994)
+++ /trunk/src/org/openstreetmap/josm/data/validation/tests/DuplicateNode.java	(revision 5995)
@@ -89,5 +89,4 @@
     protected final static int DUPLICATE_NODE_MIXED = 2;
     protected final static int DUPLICATE_NODE_OTHER = 3;
-    protected final static int DUPLICATE_NODE_UNCLOSED = 4;
     protected final static int DUPLICATE_NODE_BUILDING = 10;
     protected final static int DUPLICATE_NODE_BOUNDARY = 11;
@@ -173,6 +172,4 @@
             if (mm.get(tagSet).size() > 1) {
 
-                boolean oneWayClosed = false;
-
                 for (String type: types) {
                     typeMap.put(type, false);
@@ -187,5 +184,4 @@
                                 boolean typed = false;
                                 Way w=(Way) sp;
-                                oneWayClosed = oneWayClosed || w.isClosed();
                                 Map<String, String> keys = w.getKeys();
                                 for (String type: typeMap.keySet()) {
@@ -211,16 +207,5 @@
                 }
 
-                if (!oneWayClosed) {
-                    String msg = marktr("Duplicate nodes in two un-closed ways");
-                    errors.add(new TestError(
-                            parentTest,
-                            Severity.WARNING,
-                            tr("Duplicated nodes"),
-                            tr(msg),
-                            msg,
-                            DUPLICATE_NODE_UNCLOSED,
-                            mm.get(tagSet)
-                            ));
-                } else if (nbType>1) {
+                if (nbType>1) {
                     String msg = marktr("Mixed type duplicated nodes");
                     errors.add(new TestError(
@@ -429,6 +414,4 @@
         // never merge nodes with different tags.
         if (testError.getCode() == DUPLICATE_NODE) return false;
-        // never merge nodes from two different non-closed geometries
-        if (testError.getCode() == DUPLICATE_NODE_UNCLOSED) return false;
         // everything else is ok to merge
         return true;