Problem with simple String lists in Preon

StringArrayTest.java

import java.nio.charset.Charset;
import java.util.LinkedList;
import java.util.List;
import org.codehaus.preon.Codec;
import org.codehaus.preon.Codecs;
import org.codehaus.preon.DecodingException;
import org.codehaus.preon.annotation.BoundList;
import org.codehaus.preon.annotation.BoundNumber;
import org.codehaus.preon.annotation.BoundString;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Darien Hager
 */
public class StringArrayTest {

    private static interface TestStruct{
        public List<String> getStrings();
    }

    public static class Alpha implements TestStruct{

        @BoundNumber
        public int numStrings;
        @BoundList(size = "numStrings", type = String.class)
        public List<String> items;

        public List<String> getStrings() {
            return items;
        }

    }

    public static class Beta implements TestStruct{

        @BoundNumber
        public int numStrings;
        @BoundList(size = "numStrings", type = String.class)
        @BoundString()
        public List<String> items;

        public List<String> getStrings() {
            return items;
        }

    }
    private String[] strings = new String[]{"hello", "world"};
    private byte[] bytes = assembleBytes(strings);

    public static byte[] assembleBytes(String... strings) {
        LinkedList<Byte> list = new LinkedList<Byte>();
        for (String s : strings) {
            for (byte b : s.getBytes(Charset.forName("US-ASCII"))) {
                list.add(b);
            }
            list.add(new Byte((byte) 0x00));
        }
        list.push((byte) strings.length);
        byte[] ret = new byte[list.size()];
        int i = 0;
        for (Byte b : list) {
            ret[i] = b.byteValue();
            i++;
        }
        return ret;
    }

    protected void tryCodec(Class<?> target) throws DecodingException {
        // Try the same test with different classes
        Codec c = Codecs.create(target);
        Codecs.decode(c, this.bytes);

    }

    @Test
    public void testAlpha() throws DecodingException{
        tryCodec(Alpha.class);
    }

    @Test
    public void testBeta() throws DecodingException{
        tryCodec(Beta.class);
    }
}