Cannot insert table data with self-reference in 2.4.0

I tried to implement a database schema of employees. An employee can have a supervisor. The supervisor also an employee so there is a reference from a row in the employees table to another row in employees table.

How to reproduce:
* Unpack the files in attached zip file to a directory.
* Mysql test: Change Mysql username and password. Create the database "test"
* H2 test: It may be necessary to manually download the H2 1.0.79-jar file and deploy in your local maven repository
* Run "mvn test"

Actual:
Both the Mysql and H2 test fails (but a bit differently)

In the Mysql case no data is inserted what so ever. An exception is raised:
org.dbunit.dataset.NoSuchColumnException: EMPLOYEES.SSN - (Non-uppercase input column: ssn) in ColumnNameToIndexes cache map. Note that the map's column names are NOT case sensitive.
at org.dbunit.dataset.AbstractTableMetaData.getColumnIndex(AbstractTableMetaData.java:128)
at org.dbunit.operation.AbstractOperation.getOperationMetaData(AbstractOperation.java:89)
at org.dbunit.operation.AbstractBatchOperation.execute(AbstractBatchOperation.java:140)
at org.dbunit.operation.CompositeOperation.execute(CompositeOperation.java:79)
at se.lesc.dbunit_ref_insert_problem.InsertMysqlTest.testInsertRef(InsertMysqlTest.java:61)

In the H2 case only 2 rows are inserted

Expected:
It should be possible to populate the database even if there is a self-reference in the table.

Source code snippets:
String createEmployeesTableSql =
"CREATE TABLE employees (" +
" ssn varchar(255) NOT NULL, " +
" firstName varchar(255) default NULL, " +
" initial varchar(255) default NULL, " +
" lastName varchar(255) default NULL, " +
" salary bigint(20) default NULL, " +
" supervisor varchar(255) default NULL, " +
" PRIMARY KEY (ssn), " +
" FOREIGN KEY (supervisor) REFERENCES employees (ssn)" +
")";

<dataset>
<employees ssn="730403" firstname="Niklas" lastname="Berglind" />
<employees ssn="720202" firstname="Bjorn" lastname="Julander" />
<employees ssn="710101" firstname="Petter" lastname="Edblom" />

<employees ssn="790630" firstname="Lennart" lastname="Schedin" supervisor="730403" />
<employees ssn="760503" firstname="Johan" lastname="Fransson" supervisor="790630" />
</dataset>

DatabaseConnection iDatabaseConnection = new DatabaseConnection(connection);
IDataSet dataSet = new FlatXmlDataSet(getClass().getResource("/employees.xml"), false, true);
DatabaseOperation.CLEAN_INSERT.execute(iDatabaseConnection, dataSet);

Reproducible in: Dbunit 2.4.0 (Windows XP)
Not reproducible in: Dbunit 2.3.0 (Windows XP)