Index: trunk/src/org/openstreetmap/josm/actions/mapmode/DeleteAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/mapmode/DeleteAction.java	(revision 452)
+++ trunk/src/org/openstreetmap/josm/actions/mapmode/DeleteAction.java	(revision 453)
@@ -12,4 +12,5 @@
 import java.util.Collections;
 import java.util.HashSet;
+import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
@@ -268,4 +269,8 @@
 
 			Way wnew2 = new Way();
+			if (wnew.keys != null) {
+				wnew2.keys = new HashMap<String, String>(wnew.keys);
+				wnew2.checkTagged();
+			}
 			wnew2.nodes.addAll(n2);
 			cmds.add(new AddCommand(wnew2));