FULL PRODUCT VERSION :
1.6.0-beta-b59

A DESCRIPTION OF THE PROBLEM :
If you call JColorChooser#setSelectionModel the color chooser doesn't show a preview anymore. BasicColorChooserUI registers a listener for updating the preview panel only with the initial selection model, but doesn't reregister this listener if the color chooser's selection model changes.

BasicColorChooserUI has a property change handler that should listen to the JColorChooser's property JColorChooser.SELECTION_MODEL_PROPERTY.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Construct a JColorChooser
JColorChooser colorChooser = new JColorChooser(Color.RED);

2) Change the selection model.
colorChooser.setSelectionModel(new DefaultColorSelectionModel(Color.WHITE));

3) Display the color chooser, e.g.
JDialog dialog = JColorChooser.createDialog(null, "Choose", true, colorChooser, null, null);
dialog.show();

4) Choose a color.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After step 3, the preview panel should display WHITE, not RED.
After step 4, the preview shall display a preview of the selected color.
ACTUAL -
After step 3, the preview panel displays RED.
When choosing a color, the preview panel displays RED.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import java.awt.Color;

import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.colorchooser.DefaultColorSelectionModel;

public class BasicColorChooserUIBug {
    
    public static void main(String[] args) {
        JColorChooser colorChooser = new JColorChooser(Color.RED);
        colorChooser.setSelectionModel(new DefaultColorSelectionModel(Color.WHITE));
        JDialog dialog = JColorChooser.createDialog(null, "Choose", true, colorChooser, null, null);
        dialog.show();
    }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
1) Don't use JColorChooser#setSelectionModel. Use only JColorChooser(ColorSelectionModel)

2) Use a look&feel that fixes the bug, i.e. that listens to changes of the color selection model to reregister the preview listener.