Index: /home/dnaber/workspace/validator/src/org/openstreetmap/josm/plugins/validator/tests/SpellCheck.java
===================================================================
--- /home/dnaber/workspace/validator/src/org/openstreetmap/josm/plugins/validator/tests/SpellCheck.java	(revision 7902)
+++ /home/dnaber/workspace/validator/src/org/openstreetmap/josm/plugins/validator/tests/SpellCheck.java	(working copy)
@@ -236,7 +236,7 @@
 			}
 			if( checkKeys && spellCheckKeyData.containsKey(key) && !withErrors.contains(p, "IPK"))
 			{
-				errors.add( new TestError(this, Severity.WARNING, tr("Invalid property keys"), p, INVALID_KEY) );
+				errors.add( new TestError(this, Severity.WARNING, tr("Invalid property key ''{0}''", key), p, INVALID_KEY) );
 				withErrors.add(p, "IPK");
 			}
             if( checkValues && value != null && value.length() > 0 && spellCheckValueData != null)