Index: org/openstreetmap/josm/tools/ExceptionUtil.java
===================================================================
--- org/openstreetmap/josm/tools/ExceptionUtil.java	(revision 3107)
+++ org/openstreetmap/josm/tools/ExceptionUtil.java	(working copy)
@@ -333,9 +333,9 @@
      */
     public static String explainNestedIllegalDataException(OsmTransferException e) {
         IllegalDataException ide = getNestedException(e, IllegalDataException.class);
-        String message = tr("<html>Failed to download data."
-                + "Its format is either unsupported, ill-formed, and/or inconsistent.<br>"
-                + "<br>Details(untranslated): {0}</html>", ide.getMessage());
+        String message = tr("<html>Failed to download data. "
+                + "It's format is either unsupported, ill-formed, and/or inconsistent.<br>"
+                + "<br>Details (untranslated): {0}</html>", ide.getMessage());
         e.printStackTrace();
         return message;
     }
