Writing String (length > 4095 chars), reading Binary

When setting a property value to a String with more than 4095 characters, it is saved in the JCR tree as a PropertyType.BINARY. On a subsequent read, the Value will have type PropertyType.BINARY rather than PropertyType.STRING. I've tried saving in three different ways, results are the same. See https://github.com/vrolijken/ModeshapeStringStorage (JDK 1.7) for an example.