getBackgroundColor () after setBackgroundColor (null) does not work

[shortpasta]

Using:
GWT 2.5.0
SmartGWT 3.1p-2012-11-23
SmartClient Version: v8.3p_2012-11-23/LGPL Development Only (built 2012-11-23)
FF 19, IE 9, Chrome 26

Problem:
Call layout.setBackgroundColor ("red"); // turns background color to red as expected
Call layout.getBackgroundColor (); // returns "red" as expected

Call layout.setBackgroundColor (null); // turns background color to white as expected
Call layout.getBackgroundColor (); // returns "red", but should return null

In this sample, click Red then click Null, and I see:

00:02:24.207 [INFO] setBackgroundColor (). color: red, layoutBackgroundColorBefore: null, layoutBackgroundColorAfter: red
00:02:27.072 [INFO] setBackgroundColor (). color: null, layoutBackgroundColorBefore: red, 
layoutBackgroundColorAfter: red

Sample code:

public class SetBackgroundColor implements EntryPoint {

  // my attributes
  private final VLayout layout = new VLayout ();

  /**
   * The EntryPoint interface
   * http://forums.smartclient.com/showthread.php?p=94385
   */
  public void onModuleLoad() {

    // add a button that makes the background red
    final IButton buttonRed = new IButton ();
    buttonRed.setTitle ("Red");
    buttonRed.addClickHandler (new ClickHandler () {
      public void onClick (final ClickEvent clickEvent) {
        setBackgroundColor ("red");
      }
    });

    // add a button that shows a dialog with a canvas with no opaticy set
    final IButton buttonNull = new IButton ();
    buttonNull.setTitle ("Null");
    buttonNull.addClickHandler (new ClickHandler () {
      public void onClick (final ClickEvent clickEvent) {
        setBackgroundColor (null);
      }
    });

    // add
    layout.addMember (buttonRed);
    layout.addMember (buttonNull);
    layout.draw ();
  }

  /**
   * Uniformly sets the background color and logs debug data
   * @param color
   */
  private void setBackgroundColor (final String color) {

    final String layoutBackgroundColorBefore = layout.getBackgroundColor ();
    layout.setBackgroundColor (color);
    final String layoutBackgroundColorAfter = layout.getBackgroundColor ();
    GWT.log (
      "setBackgroundColor (). color: " + color + ", " +
      "layoutBackgroundColorBefore: " + layoutBackgroundColorBefore + ", " +
      "layoutBackgroundColorAfter: " + layoutBackgroundColorAfter);
  }
}

[Isomorphic]

Thanks for the report - we've fixed this for 3.1 and 4.0 - please retest with a nightly build dated May 19 or later

[shortpasta]

Just tested - seems fixed with this:
SmartClient Version: v8.3p_2013-05-23/LGPL Development Only (built 2013-05-23)

Now the output is as expected:

00:00:17.663 [INFO] setBackgroundColor (). color: red, layoutBackgroundColorBefore: null, layoutBackgroundColorAfter: red
00:00:19.321 [INFO] setBackgroundColor (). color: null, layoutBackgroundColorBefore: red, layoutBackgroundColorAfter: null

Thanks!