Index: trunk/src/org/openstreetmap/josm/data/osm/DataSetMerger.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/DataSetMerger.java	(revision 3376)
+++ trunk/src/org/openstreetmap/josm/data/osm/DataSetMerger.java	(revision 3377)
@@ -309,10 +309,9 @@
             conflicts.add(target,source);
         } else {
-            // clone from other, but keep the modified flag. mergeFrom will mainly copy
+            // clone from other. mergeFrom will mainly copy
             // technical attributes like timestamp or user information. Semantic
             // attributes should already be equal if we get here.
             //
             target.mergeFrom(source);
-            target.setModified(true);
             objectsWithChildrenToMerge.add(source.getPrimitiveId());
         }