Bug 134266 [Wizard] Page description not set if page message already set
Since page messages such as errors and warnings used to be displayed in the same widget as the page description, code was put in place in WizardDialog#updateDescriptionMessage() to avoid setting the page description if there was already a message. As of 3.2 M6 there is a separate widget for displaying error and warning messages and so the page description should always be set.
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
*/
            public void subTask(String name) {
                super.subTask(name);
                
                if (currentTask == null) {
					currentTask = name;
				}
            }
        };
    }
    /**
     * Creates the container that holds all pages.
     * @param parent
     * @return Composite
     */
    private Composite createPageContainer(Composite parent) {
        Composite result = new Composite(parent, SWT.NULL);
        result.setLayout(pageContainerLayout);
        return result;
    }
    /**
     * Allow the wizard's pages to pre-create their page controls.
     * This allows the wizard dialog to open to the correct size.
     */
    private void createPageControls() {
        
        
        wizard.createPageControls(pageContainer);
        
        IWizardPage[] pages = wizard.getPages();