Index: src/main/java/org/apache/jackrabbit/core/PropertyImpl.java
===================================================================
--- src/main/java/org/apache/jackrabbit/core/PropertyImpl.java	(revision 642974)
+++ src/main/java/org/apache/jackrabbit/core/PropertyImpl.java	(working copy)
@@ -174,6 +174,9 @@
             case PropertyType.STRING:
             case PropertyType.LONG:
             case PropertyType.DOUBLE:
+            case PropertyType.DATE:
+            case PropertyType.REFERENCE:
+            case PropertyType.BOOLEAN:
                 return value.toString().length();
 
             case PropertyType.NAME: