[macosx] Directories are not deselected when JFileChooser has FILES_ONLY selection mode

Java(TM) SE Runtime Environment (build 1.6.0_29-b11-397-11M3521)

Steps to reproduce:
- Run the code below:
----------------------------
import java.io.*;
import javax.swing.*;

public class FileChooserDirTest {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {

                JFileChooser chooser = new JFileChooser();
                chooser.setMultiSelectionEnabled(true);
                chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
                int returnVal = chooser.showOpenDialog(null);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                    File[] files = chooser.getSelectedFiles();
                    for(File file: files){
                        System.out.println("Selected file: " + file);
                    }
                }
            }
        });
    }
}
----------------------------

- Select both files and directories
The directories are not deselected