When I perform a CreateCriteria() with some Expressions I get a list where all objects are double.

How could this be?

Hibernate version:
1.0.4

MappingFile

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="ConditionTreeNode" table="conditiontreenode" >
<id name="ID" column="ID" type="Int32" unsaved-value="0">
<generator class="identity" />
</id>
<many-to-one name ="Condition" column ="ID_RefCondition" class ="Condition" fetch="join" />
<many-to-one name ="ValueType" column ="ID_RefValueType" class ="ConditionTreeNodeValueType" fetch="join" />
<property name="Value" column="Value" type="String" length="50" />
<many-to-one name ="ParentTreeNode" column ="ID_RefParentTreeNode" class ="ConditionTreeNode" />
<many-to-one name ="NextTreeNode" column ="ID_RefNextTreeNode" class ="ConditionTreeNode" />
<many-to-one name ="PreviousTreeNode" column ="ID_RefPreviousTreeNode" class ="ConditionTreeNode" />
</class>

</hibernate-mapping>

Looks like the issue described in http://www.hibernate.org/117.html#A12