Index: lucene/core/src/java/org/apache/lucene/document/Field.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/document/Field.java	(revision 1244940)
+++ lucene/core/src/java/org/apache/lucene/document/Field.java	(working copy)
@@ -88,6 +88,13 @@
     /** Index the field's value without using an Analyzer, so it can be searched.
      * As no analyzer is used the value will be stored as a single term. This is
      * useful for unique Ids like product numbers.
+     * <p>
+     * <b><font color="red">
+     * WARNING: DO NOT USE THIS IF YOU USE THE QUERYPARSER!
+     * Instead, create a PerFieldAnalyzerWrapper as your Analyzer,
+     * with KeywordAnalyzer set for this field, so the queryparser 
+     * knows not to analyze it.
+     * </font></b>
      */
     NOT_ANALYZED {
       @Override