Index: C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/criterion/SubqueryExpression.java
===================================================================
--- C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/criterion/SubqueryExpression.java	(revision 53)
+++ C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/criterion/SubqueryExpression.java	(working copy)
@@ -38,7 +38,11 @@
 	}
 	
 	protected abstract String toLeftSqlString(Criteria criteria, CriteriaQuery outerQuery);
-
+	
+    public CriteriaImpl getDetachedCriteriaImpl()
+    {
+        return criteriaImpl;
+    }
 	public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
 	throws HibernateException {
 
Index: C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/loader/criteria/CriteriaQueryTranslator.java
===================================================================
--- C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/loader/criteria/CriteriaQueryTranslator.java	(revision 53)
+++ C:/dev_home/Hibernate/Hibernate3.2.6/src/org/hibernate/loader/criteria/CriteriaQueryTranslator.java	(working copy)
@@ -20,7 +20,9 @@
 import org.hibernate.QueryException;
 import org.hibernate.hql.ast.util.SessionFactoryHelper;
 import org.hibernate.criterion.CriteriaQuery;
+import org.hibernate.criterion.Criterion;
 import org.hibernate.criterion.Projection;
+import org.hibernate.criterion.SubqueryExpression;
 import org.hibernate.engine.QueryParameters;
 import org.hibernate.engine.RowSelection;
 import org.hibernate.engine.SessionFactoryImplementor;
@@ -114,6 +116,22 @@
 			String entityName = ( String ) iter.next();
 			result.addAll( Arrays.asList( getFactory().getEntityPersister( entityName ).getQuerySpaces() ) );
 		}
+        
+        iter = rootCriteria.iterateExpressionEntries();
+        
+        while (iter.hasNext())
+        {
+            CriteriaImpl.CriterionEntry entry = (CriteriaImpl.CriterionEntry) iter.next();
+            
+            Criterion criterion = entry.getCriterion();
+            
+            if (criterion instanceof SubqueryExpression)
+            {
+                SubqueryExpression subqueryExpression = (SubqueryExpression) criterion;
+                
+                result.addAll(Arrays.asList(getFactory().getEntityPersister( subqueryExpression.getDetachedCriteriaImpl().getEntityOrClassName() ).getQuerySpaces()));
+            }
+        }
 		return result;
 	}