JAXB marshaling and unmarshaling

I used JAXB to generate nine classes (one is simply a type-safe enum) to correspond to my XML DTD. I then wrote the code to instantiate the root and some child elements which are all added to the root content. Then I am able to call validate() and marshal() on the root element and produce the desired XML. Great!
The trouble is that I'm having difficulty using these classes to unmarshal the XML that they validated and wrote. Has anyone else seen this? In some cases, the call to unmarshal() returns the root element with no content (e.g., "<myRoot/>"). In other cases, I get an InvalidContentException on a nested element that repeats (e.g., "Expected an end tag for a "fooList" element, but found a start tag for a "foo" element").
Has anyone else seen this? I've been through the bug parade and didn't catch this mentioned there.

Here's the code for the problem I'm running into. Is anyone able to reproduce the problem and diagnose it? I must be doing something wrong because the Checkbook example works just fine for me. Please help!
The obvious trouble here is that Test4.java does not correctly unmarshal the XML that it writes to temp.xml. Where have I gone wrong?
-------- begin cut (xyz.dtd) --------
<!ELEMENT Name ( #PCDATA ) >
<!ELEMENT Transaction ( Id, Name, Amt ) >
<!ELEMENT Transactions ( Transaction+ ) >
<!ATTLIST Transactions count NMTOKEN #IMPLIED >
--------- end cut (xyz.dtd) ---------
-------- begin cut (xyz.xjs) --------
<?xml version="1.0" encoding="ISO-8859-1" ?>
<xml-java-binding-schema version="1.0-ea">
<options package="xyz"/>
<element name="Transactions" type="class" root="true">
<attribute name="count" convert="int"/>
<element-ref name="Transaction"/>
<element name="Name" type="value"/>
<element name="Amt" type="value" convert="int"/>
<element name="Id" type="value" convert="int"/>
<element name="Transaction" type="class">
<element-ref name="Id"/>
<element-ref name="Name"/>
<element-ref name="Amt"/>
--------- end cut (xyz.xjs) ---------
-------- begin cut (Test4.java) --------
import xyz.*;
import javax.xml.bind.*;
import javax.xml.marshal.*;
import java.io.*;
import java.util.Date;
import java.util.Random;
public class Test4 {
private static Random rand = new Random();
public static void main(String[] args) {
// need file to work with...
try {
File f = new File( "temp.xml" );
FileOutputStream fout =
new FileOutputStream( f );
// make some transactions
int TransCt = 1;
Transactions txns = new Transactions();
java.util.List transactions = txns.getTransaction();
for (int i=0; i < TransCt; i++) {
Transaction t = makeBogus();
transactions.add( t );
txns.setCount( TransCt );
txns.marshal( fout );
FileInputStream fin = new FileInputStream( f );
Transactions t = new Transactions();
t.unmarshal( fin );
t.marshal( System.out );
catch (Exception e) {
private static Transaction makeBogus() {
String[] names =
{ "Bob", "Larry", "Tom", "Ted", "Bill",
"Gail", "Louise", "Sam", "Erin", "Wilma" };
Transaction transaction = new Transaction();
// calculate transaction id...
int range = Integer.MAX_VALUE / 3 * 2;
int Id = rand.nextInt(range);
transaction.setId( Id );
// pick a name
transaction.setName( names[rand.nextInt(10)] );
transaction.setAmt( rand.nextInt( 100 ) );
return transaction;
--------- end cut (Test4.java) ---------

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