Index: trunk/src/org/openstreetmap/josm/data/validation/tests/OpeningHourTest.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/OpeningHourTest.java	(revision 6532)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/OpeningHourTest.java	(revision 6533)
@@ -198,4 +198,7 @@
                 errors.add(new OpeningHoursTestError(i.toString().trim(), Severity.WARNING, prettifiedValue));
             }
+            if (errors.isEmpty() && prettifiedValue != null && !value.equals(prettifiedValue)) {
+                errors.add(new OpeningHoursTestError(tr("opening_hours value can be prettified"), Severity.OTHER, prettifiedValue));
+            }
             return errors;
         } catch (final Exception ex) {