Index: trunk/src/org/openstreetmap/josm/data/validation/util/MultipleNameVisitor.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/util/MultipleNameVisitor.java	(revision 8872)
+++ trunk/src/org/openstreetmap/josm/data/validation/util/MultipleNameVisitor.java	(revision 8873)
@@ -63,12 +63,14 @@
             displayName = name;
         } else {
-            displayName = size + ' ' + trn(multipleClassname, multiplePluralClassname, size);
+            StringBuilder sb = new StringBuilder().append(size).append(' ').append(trn(multipleClassname, multiplePluralClassname, size));
             if (multipleName.length() > 0) {
+                sb.append(": ");
                 if (multipleName.length() <= MULTIPLE_NAME_MAX_LENGTH) {
-                    displayName += ": " + multipleName;
+                    sb.append(multipleName);
                 } else {
-                    displayName += ": " + multipleName.substring(0, MULTIPLE_NAME_MAX_LENGTH) + "...";
+                    sb.append(multipleName.substring(0, MULTIPLE_NAME_MAX_LENGTH)).append("...");
                 }
             }
+            displayName = sb.toString();
         }
     }