Index: trunk/src/org/openstreetmap/josm/io/OsmApiException.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmApiException.java	(revision 15084)
+++ trunk/src/org/openstreetmap/josm/io/OsmApiException.java	(revision 15085)
@@ -221,5 +221,5 @@
                 sb.append(tr(header));
             }
-            if (body != null && !body.isEmpty()) {
+            if (body != null && !body.isEmpty() && !body.equals(header)) {
                 if (sb.length() > 0) {
                     sb.append(". ");