Index: trunk/src/org/openstreetmap/josm/io/OsmApiException.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmApiException.java	(revision 1748)
+++ trunk/src/org/openstreetmap/josm/io/OsmApiException.java	(revision 1749)
@@ -65,7 +65,10 @@
         }
         if (errorBody != null) {
-            sb.append(",Error Body=<")
-            .append(errorBody)
-            .append(">");
+            errorBody = errorBody.replaceAll("^[ \n\t\r]+", "").replaceAll("[ \n\t\r]+$", "");
+            if(!errorBody.equals(errorHeader)) {
+                sb.append(", Error Body=<")
+                .append(errorBody)
+                .append(">");
+            }
         }
         return sb.toString();