Index: /trunk/src/org/openstreetmap/josm/data/projection/Mercator.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/projection/Mercator.java	(revision 3204)
+++ /trunk/src/org/openstreetmap/josm/data/projection/Mercator.java	(revision 3205)
@@ -39,5 +39,5 @@
 
     public String toCode() {
-        return "EPSG:3785";
+        return "EPSG:3857"; /* initially they used 3785 but that has been superseded, see http://www.epsg-registry.org/ */
     }